{"id":2504,"date":"2025-09-30T15:13:12","date_gmt":"2025-09-30T15:13:12","guid":{"rendered":"https:\/\/productionscrews.com\/"},"modified":"2025-09-30T15:13:12","modified_gmt":"2025-09-30T15:13:12","slug":"raw-material-testing-a-comprehensive-guide-to-quality-control-methods-2024","status":"publish","type":"post","link":"https:\/\/productionscrews.com\/pt\/raw-material-testing-a-comprehensive-guide-to-quality-control-methods-2024\/","title":{"rendered":"Teste de mat\u00e9ria-prima: Um guia abrangente para m\u00e9todos de controle de qualidade 2024"},"content":{"rendered":"<h2><span lang=\"EN-US\">The Complete Guide to Raw Material Testing: Understanding the Main Methods<\/span><\/h2>\n<h2>Why Testing Raw Materials Matters<\/h2>\n<p>Raw materials are the basic parts that make up any product\u2019s quality, safety, and how well it works. When there are problems with these starting materials \u2013 like differences in quality, unwanted substances, or materials that don\u2019t meet standards \u2013 these issues spread through the entire manufacturing process. This leads to poor final products, problems with regulations, and major financial losses. <a href=\"https:\/\/productionscrews.com\/pt\/ultimate-guide-alloy-steel-screws-raw-material-selection-for-maximum-strength\/\"  data-wpil-monitor-id=\"314\" target=\"_blank\">Raw Material<\/a> Testing is the scientific study used to check the identity, purity, makeup, and important properties of these materials against a set list of requirements. This isn\u2019t just a simple pass or fail check \u2013 it\u2019s a detailed scientific process that forms the foundation of modern <a href=\"https:\/\/productionscrews.com\/pt\/ultimate-guide-to-spring-clip-production-materials-steps-quality-control\/\"  data-wpil-monitor-id=\"318\" target=\"_blank\">controle de qualidade<\/a>.<\/p>\n<p>Isso <a href=\"https:\/\/productionscrews.com\/pt\/color-blending-math-science-technical-guide-for-developers-2025\/\"  data-wpil-monitor-id=\"320\" target=\"_blank\">fornece a voc\u00ea um guia t\u00e9cnico completo<\/a> analysis of the main principles and methods that support an effective Raw Material Testing program. Our goal is to go beyond a basic list of tests and explore the science of why and how these methods work. In this detailed look, we will cover:<\/p>\n<ul>\n<li><a href=\"https:\/\/productionscrews.com\/pt\/the-science-behind-metal-cutting-from-basic-principles-to-expert-mastery\/\"  data-wpil-monitor-id=\"315\" target=\"_blank\">Basic principles<\/a> of material analysis<\/li>\n<li>Detailed breakdown of spectroscopic and chromatographic techniques<\/li>\n<li>O <a href=\"https:\/\/productionscrews.com\/pt\/the-ultimate-guide-to-cold-heading-steel-science-behind-metal-forming\/\"  data-wpil-monitor-id=\"316\" target=\"_blank\">ci\u00eancia por tr\u00e1s<\/a> physical and mechanical property testing<\/li>\n<li>Practical considerations for putting together a strong testing strategy<\/li>\n<\/ul>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone size-full wp-image-2508\" src=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/09\/unsplash-3z7Ouv9lpQg.jpg\" alt=\"black camera\" width=\"1600\" height=\"1060\" srcset=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/09\/unsplash-3z7Ouv9lpQg.jpg 1600w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/09\/unsplash-3z7Ouv9lpQg-300x199.jpg 300w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/09\/unsplash-3z7Ouv9lpQg-768x509.jpg 768w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/09\/unsplash-3z7Ouv9lpQg-1536x1018.jpg 1536w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/09\/unsplash-3z7Ouv9lpQg-18x12.jpg 18w\" sizes=\"(max-width: 1600px) 100vw, 1600px\" \/><\/p>\n<h2>Basic Principles of Analysis<\/h2>\n<p>Before we look at specific instruments and techniques, we must first understand the <a href=\"https:\/\/productionscrews.com\/pt\/ultimate-guide-to-dimensional-inspection-from-basic-principles-to-modern-methods\/\"  data-wpil-monitor-id=\"317\" target=\"_blank\">princ\u00edpios b\u00e1sicos<\/a> that control all material analysis. These concepts provide the framework for choosing the right test, setting appropriate limits, and correctly understanding results. Every analytical chemist and quality control manager must have a solid understanding of these first principles to solve problems and ensure material integrity.<\/p>\n<h3>Qualitative vs. Quantitative Analysis<\/h3>\n<p>At its core, every analytical test answers one of two basic questions. Qualitative Analysis focuses on identity, answering the question, \u201cWhat is it?\u201d Its main purpose in Raw Material Testing is to confirm that the material received is exactly what it claims to be. For example, a qualitative test checks that a drum labeled \u201cAscorbic Acid\u201d does indeed contain ascorbic acid and not a different, visually similar compound like citric acid. This is the first and most critical gate in the testing process.<\/p>\n<p>Quantitative Analysis, on the other hand, focuses on amount, answering the question, \u201cHow much is present?\u201d This is used to determine the purity of a substance, the concentration of its active ingredient, or the level of specific impurities. For instance, a quantitative test might determine that a batch of an active pharmaceutical ingredient (API) is 99.8% pure and contains no more than 0.05% of a specific related substance.<\/p>\n<h3>The Concept of a Specification<\/h3>\n<p>A material is not tested in isolation; it is judged against a Specification. A specification is the definitive technical document that lists the required tests, the analytical procedures to be followed, and the acceptance criteria the raw material must meet to be approved for use. This document serves as the contract between the material supplier and the user. Specifications are not random; they are carefully developed based on a material\u2019s intended use, its impact on the final product, and established industry standards. Often, these are based on official pharmacopeias such as the United States Pharmacopeia (USP) or European Pharmacopoeia (EP) for pharmaceutical materials, or on standards from organizations like ASTM International or the International Organization for Standardization (ISO) for industrial chemicals and materials.<\/p>\n<h3>Sampling and Sample Preparation<\/h3>\n<p>The most advanced analytical instrument in the world will produce a meaningless result if the sample it analyzes is not representative of the entire batch. Proper sampling is a critical, and often overlooked, step. A sample must be taken using a validated procedure that ensures it accurately reflects the potential variability within the entire lot of material, which could consist of dozens of drums or bags. Poor sampling techniques can completely invalidate the most precise analytical testing. Following sampling, sample preparation\u2014such as dissolving, extracting, or diluting the material\u2014must be performed with precision to ensure the final measurement is accurate and reproducible.<\/p>\n<h2>A Comparative Overview of Techniques<\/h2>\n<p>The field of analytical chemistry offers a vast arsenal of techniques for Raw Material Testing. To navigate this landscape effectively, we can group these methods into three major categories based on their underlying scientific principles. Understanding these categories helps in creating a logical testing strategy where different techniques are used to provide complementary information. The primary categories we will explore are Spectroscopic, Chromatographic, and Physical\/Mechanical methods. Each provides a unique window into the material\u2019s properties.<\/p>\n<table>\n<tbody>\n<tr>\n<td width=\"115\">Categoria<\/td>\n<td width=\"115\">Core Principle<\/td>\n<td width=\"115\">Caso de uso principal<\/td>\n<td width=\"115\">Examples<\/td>\n<td width=\"115\">Principais vantagens<\/td>\n<\/tr>\n<tr>\n<td width=\"115\">Spectroscopic Methods<\/td>\n<td width=\"115\">Interaction of electromagnetic radiation with matter.<\/td>\n<td width=\"115\">Identity confirmation, functional group analysis, elemental concentration.<\/td>\n<td width=\"115\">FTIR, UV-Vis, AAS, NMR<\/td>\n<td width=\"115\">Speed, non-destructive (often), high specificity for structure.<\/td>\n<\/tr>\n<tr>\n<td width=\"115\">Chromatographic Methods<\/td>\n<td width=\"115\">Physical separation of components in a mixture.<\/td>\n<td width=\"115\">Purity assessment, separation and quantification of impurities or active ingredients.<\/td>\n<td width=\"115\">HPLC, GC, TLC<\/td>\n<td width=\"115\">High separation power, excellent for complex mixtures, highly quantitative.<\/td>\n<\/tr>\n<tr>\n<td width=\"115\">Physical &amp; Mechanical<\/td>\n<td width=\"115\">Measurement of bulk physical or mechanical properties.<\/td>\n<td width=\"115\">Verifying physical form, performance under stress, and processing characteristics.<\/td>\n<td width=\"115\">cURL Too many subrequests.<\/td>\n<td width=\"115\">cURL Too many subrequests.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>cURL Too many subrequests.<\/h2>\n<p>cURL Too many subrequests.<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-2507\" src=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/09\/pixabay-1320200.jpg\" alt=\"concrete plant, gravel plant, concrete, raw material, industry, industrial plant, building material, bulk goods, crane, conveyor belt, concrete plant, concrete plant, concrete plant, concrete plant, concrete plant, concrete, conveyor belt, conveyor belt, conveyor belt\" width=\"1280\" height=\"960\" srcset=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/09\/pixabay-1320200.jpg 1280w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/09\/pixabay-1320200-300x225.jpg 300w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/09\/pixabay-1320200-768x576.jpg 768w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/09\/pixabay-1320200-16x12.jpg 16w\" sizes=\"(max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<h3>cURL Too many subrequests.<\/h3>\n<p>cURL Too many subrequests.<\/p>\n<h3>cURL Too many subrequests.<\/h3>\n<p>cURL Too many subrequests.<\/p>\n<h3>cURL Too many subrequests.<\/h3>\n<p>cURL Too many subrequests. <a href=\"https:\/\/productionscrews.com\/pt\/essential-guide-to-forging-blanks-from-raw-metal-to-high-performance-parts\/\"  data-wpil-monitor-id=\"321\" target=\"_blank\">cURL Too many subrequests.<\/a> cURL Too many subrequests.<\/p>\n<table>\n<tbody>\n<tr>\n<td width=\"144\">T\u00e9cnica<\/td>\n<td width=\"144\">cURL Too many subrequests.<\/td>\n<td width=\"144\">cURL Too many subrequests.<\/td>\n<td width=\"144\">cURL Too many subrequests.<\/td>\n<\/tr>\n<tr>\n<td width=\"144\">cURL Too many subrequests.<\/td>\n<td width=\"144\">cURL Too many subrequests.<\/td>\n<td width=\"144\">cURL Too many subrequests.<\/td>\n<td width=\"144\">cURL Too many subrequests.<\/td>\n<\/tr>\n<tr>\n<td width=\"144\">cURL Too many subrequests.<\/td>\n<td width=\"144\">cURL Too many subrequests.<\/td>\n<td width=\"144\">cURL Too many subrequests.<\/td>\n<td width=\"144\">cURL Too many subrequests.<\/td>\n<\/tr>\n<tr>\n<td width=\"144\">cURL Too many subrequests.<\/td>\n<td width=\"144\">cURL Too many subrequests.<\/td>\n<td width=\"144\">cURL Too many subrequests.<\/td>\n<td width=\"144\">cURL Too many subrequests.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>cURL Too many subrequests.<\/h2>\n<p>cURL Too many subrequests.<\/p>\n<h3>cURL Too many subrequests.<\/h3>\n<p>cURL Too many subrequests.<\/p>\n<p>&nbsp;<\/p>\n<h3>cURL Too many subrequests.<\/h3>\n<p>cURL Too many subrequests.<\/p>\n<table>\n<tbody>\n<tr>\n<td width=\"192\">Recurso<\/td>\n<td width=\"192\">cURL Too many subrequests.<\/td>\n<td width=\"192\">cURL Too many subrequests.<\/td>\n<\/tr>\n<tr>\n<td width=\"192\">cURL Too many subrequests.<\/td>\n<td width=\"192\">cURL Too many subrequests.<\/td>\n<td width=\"192\">cURL Too many subrequests.<\/td>\n<\/tr>\n<tr>\n<td width=\"192\">cURL Too many subrequests.<\/td>\n<td width=\"192\">cURL Too many subrequests.<\/td>\n<td width=\"192\">cURL Too many subrequests.<\/td>\n<\/tr>\n<tr>\n<td width=\"192\">cURL Too many subrequests.<\/td>\n<td width=\"192\">Non-volatile, thermally unstable, larger molecules.<\/td>\n<td width=\"192\">Volatile, thermally stable molecules.<\/td>\n<\/tr>\n<tr>\n<td width=\"192\">Principle of Separation<\/td>\n<td width=\"192\">Based on analyte\u2019s affinity for the stationary vs. mobile phase.<\/td>\n<td width=\"192\">Based on analyte\u2019s boiling point and interaction with the stationary phase.<\/td>\n<\/tr>\n<tr>\n<td width=\"192\">Typical Application in RMT<\/td>\n<td width=\"192\">Assay and Purity of APIs: Separating an active drug from its related impurities or degradation products.<\/td>\n<td width=\"192\">Residual Solvent Analysis: Detecting and quantifying solvents (e.g., ethanol, acetone) left over from the <a href=\"https:\/\/productionscrews.com\/pt\/ultimate-guide-to-stud-screw-process-manufacturing-excellence-revealed\/\"  data-wpil-monitor-id=\"319\" target=\"_blank\">processo de fabrica\u00e7\u00e3o<\/a>.<\/td>\n<\/tr>\n<tr>\n<td width=\"192\">Key Consideration<\/td>\n<td width=\"192\">Wide applicability for most pharmaceutical and chemical materials.<\/td>\n<td width=\"192\">Requires analytes to be volatile or made volatile through derivatization.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Physical and Mechanical Analysis<\/h2>\n<p>A raw material\u2019s chemical identity and purity are only part of the story. Its physical and mechanical properties are equally critical, as they dictate how the material will handle, process, and perform in its end-use application. A material that is 100% pure chemically can still fail completely if its physical form is incorrect. These tests bridge the gap between chemical composition and real-world functionality, ensuring that a material not only is what it should be but also behaves as it should.<\/p>\n<ul>\n<li>Particle Size Analysis: The size and distribution of a material\u2019s particles have a profound impact on its behavior. For pharmaceutical powders, particle size governs dissolution rates (and thus bioavailability), flowability (critical for tablet and capsule manufacturing), and content uniformity. For pigments and fillers, it affects texture and appearance. Modern techniques like laser diffraction can rapidly and accurately measure particle size distribution from the sub-micron to millimeter range.<\/li>\n<li>Melting Point: This is a classic, yet powerful, test for the purity of a crystalline solid. A pure compound will have a sharp, well-defined melting point. The presence of impurities disrupts the crystal lattice, typically causing the melting point to become depressed and the melting range to broaden. A specification will often list a narrow acceptance range for the melting point as an indicator of high purity.<\/li>\n<li>Moisture Content: The amount of water in a raw material can be a critical quality attribute. Excess moisture can promote microbial growth, cause chemical degradation through hydrolysis, or simply alter the effective concentration of the active material by adding weight. Karl Fischer titration is the benchmark method for accurately determining water content, capable of measuring moisture from parts per million to 100%.<\/li>\n<li>Viscosity: For liquid raw materials such as oils, syrups, or polymer solutions, viscosity is a key parameter. It determines how the liquid will flow, how easily it can be pumped and mixed, and how it will contribute to the texture and stability of a final formulation. Rotational viscometers are commonly used to measure this property under controlled shear conditions.<\/li>\n<li>Tensile Strength\/Hardness: For solid materials like plastics, polymers, or metals that will be used in structural applications, mechanical properties are paramount. Tensile strength measures a material\u2019s resistance to being pulled apart, while hardness measures its resistance to surface indentation. These tests are essential for ensuring a raw material can withstand the mechanical stresses it will encounter during processing and in its final form.<\/li>\n<\/ul>\n<h2><img decoding=\"async\" class=\"alignnone size-full wp-image-2506\" src=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/09\/pixabay-208866.jpg\" alt=\"ind\u00fastria, constru\u00e7\u00e3o, lix\u00e3o, mat\u00e9rias-primas, mat\u00e9rias-primas, mat\u00e9rias-primas, mat\u00e9rias-primas, mat\u00e9rias-primas, mat\u00e9rias-primas, mat\u00e9rias-primas\" width=\"1280\" height=\"853\" srcset=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/09\/pixabay-208866.jpg 1280w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/09\/pixabay-208866-300x200.jpg 300w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/09\/pixabay-208866-768x512.jpg 768w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/09\/pixabay-208866-18x12.jpg 18w\" sizes=\"(max-width: 1280px) 100vw, 1280px\" \/>Implementing a Robust Program<\/h2>\n<p>Translating technical knowledge into a practical, compliant, and efficient testing program requires a strategic framework. A robust program is not just about running tests; it is about managing risk, validating methods, and using data to ensure consistent quality. When we receive a new raw material, especially from a new supplier, we follow a rigorous qualification process that integrates these technical principles.<\/p>\n<ol>\n<li>Risk Assessment &amp; Specification Development: The process begins with a risk assessment. We evaluate the material\u2019s function and its potential impact on the final product\u2019s safety and efficacy. A critical API will have a much more stringent testing plan than an inert processing aid. Based on this risk assessment, we develop a comprehensive specification, defining the tests, methods, and acceptance criteria that will ensure the material is fit for its intended purpose.<\/li>\n<li>Method Selection and Validation: With the specification in place, we select the appropriate analytical methods, referencing the techniques discussed earlier. An identity test might use FTIR, an assay might use HPLC, and impurity testing might require GC for residual solvents and AAS for heavy metals. Crucially, these methods must be validated. Method validation is the documented process that proves an analytical procedure is suitable for its intended use, demonstrating that it is accurate, precise, repeatable, and robust.<\/li>\n<li>Routine Testing vs. Full Qualification: We differentiate between the initial, comprehensive testing required for a new material or supplier and the more streamlined testing for routine deliveries. A full qualification involves performing every test on the specification for multiple initial batches to establish a baseline of quality and consistency. Once a supplier is qualified, routine testing for subsequent batches may be reduced to a critical subset of tests, such as identity (e.g., FTIR) and a certificate of analysis (CoA) review, based on a risk-based approach and supplier performance history.<\/li>\n<\/ol>\n<p>A forward-thinking program also embraces modern data analysis. The concept of Chemometrics involves using multivariate statistical models to extract more information from complex chemical data. For example, a single FTIR spectrum can be used not only for identity but also, with a proper model, to simultaneously predict properties like moisture content or particle size, enabling faster release decisions. Furthermore, Machine Learning (ML) algorithms are beginning to be deployed for advanced trend analysis. These systems can monitor batch-to-batch data from techniques like HPLC, automatically detecting subtle drifts or out-of-trend anomalies that might indicate a developing issue in the supplier\u2019s manufacturing process, enabling proactive quality management rather than reactive failure investigation.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-2505\" src=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/09\/unsplash-czGYgzmdYig.jpg\" alt=\"black and silver audio mixer\" width=\"1600\" height=\"1200\" srcset=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/09\/unsplash-czGYgzmdYig.jpg 1600w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/09\/unsplash-czGYgzmdYig-300x225.jpg 300w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/09\/unsplash-czGYgzmdYig-768x576.jpg 768w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/09\/unsplash-czGYgzmdYig-1536x1152.jpg 1536w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/09\/unsplash-czGYgzmdYig-16x12.jpg 16w\" sizes=\"(max-width: 1600px) 100vw, 1600px\" \/><\/p>\n<h2>The Future of Material Analysis<\/h2>\n<p>Rigorous Raw Material Testing is a dynamic, multi-faceted discipline that stands at the intersection of chemistry, physics, and data science. It is the first line of defense in ensuring product quality and safety. As we have explored, a successful program relies on a deep technical understanding of the core analytical principles, from the molecular fingerprints revealed by spectroscopic methods to the powerful separation capabilities of chromatography and the functional insights provided by physical property analysis.<\/p>\n<p>The future of this field is one of increasing precision and intelligence. As manufacturing processes become more sophisticated and global supply chains more complex, the demands on analytical science will only intensify. The shift is moving away from simply testing for compliance and towards a more predictive, data-driven model of quality assurance. The integration of advanced data analytics, chemometrics, and machine learning will empower us to not only verify the quality of the materials we receive but also to anticipate and prevent quality issues before they arise, securing the integrity of our products from the very first step.<\/p>\n<ul>\n<li class=\"whitespace-normal break-words\"><strong>Galvanoplastia - Wikip\u00e9dia<\/strong> <a class=\"underline\" href=\"https:\/\/en.wikipedia.org\/wiki\/Electroplating\" target=\"_blank\" rel=\"noopener\">https:\/\/en.wikipedia.org\/wiki\/Electroplating<\/a><\/li>\n<li class=\"whitespace-normal break-words\"><strong>Anodiza\u00e7\u00e3o - Wikipedia<\/strong> <a class=\"underline\" href=\"https:\/\/en.wikipedia.org\/wiki\/Anodizing\" target=\"_blank\" rel=\"noopener\">https:\/\/en.wikipedia.org\/wiki\/Anodizing<\/a><\/li>\n<li class=\"whitespace-normal break-words\"><strong>ScienceDirect Topics - Tratamento eletroqu\u00edmico de superf\u00edcies<\/strong> <a class=\"underline\" href=\"https:\/\/www.sciencedirect.com\/topics\/materials-science\/electrochemical-surface-treatment\" target=\"_blank\" rel=\"noopener\">https:\/\/www.sciencedirect.com\/topics\/materials-science\/electrochemical-surface-treatment<\/a><\/li>\n<li class=\"whitespace-normal break-words\"><strong>ASTM International - Padr\u00f5es de tratamento de superf\u00edcie<\/strong> <a class=\"underline\" href=\"https:\/\/www.astm.org\/\" target=\"_blank\" rel=\"noopener\">https:\/\/www.astm.org\/<\/a><\/li>\n<li class=\"whitespace-normal break-words\"><strong>Associa\u00e7\u00e3o para Prote\u00e7\u00e3o e Desempenho de Materiais (AMPP)<\/strong> <a class=\"underline\" href=\"https:\/\/ampp.org\/\" target=\"_blank\" rel=\"noopener\">https:\/\/ampp.org\/<\/a><\/li>\n<li class=\"whitespace-normal break-words\"><strong>ASM International - Engenharia de superf\u00edcie<\/strong> <a class=\"underline\" href=\"https:\/\/www.asminternational.org\/\" target=\"_blank\" rel=\"noopener\">https:\/\/www.asminternational.org\/<\/a><\/li>\n<li class=\"whitespace-normal break-words\"><strong>NIST - Ci\u00eancia da Medi\u00e7\u00e3o de Materiais<\/strong> <a class=\"underline\" href=\"https:\/\/www.nist.gov\/mml\" target=\"_blank\" rel=\"noopener\">https:\/\/www.nist.gov\/mml<\/a><\/li>\n<li class=\"whitespace-normal break-words\"><strong>SpringerLink - Tecnologia de superf\u00edcies e revestimentos<\/strong> <a class=\"underline\" href=\"https:\/\/link.springer.com\/journal\/11998\" target=\"_blank\" rel=\"noopener\">https:\/\/link.springer.com\/journal\/11998<\/a><\/li>\n<li class=\"whitespace-normal break-words\"><strong>Materials Today - Engenharia de superf\u00edcie<\/strong> <a class=\"underline\" href=\"https:\/\/www.materialstoday.com\/\" target=\"_blank\" rel=\"noopener\">https:\/\/www.materialstoday.com\/<\/a><\/li>\n<li class=\"whitespace-normal break-words\"><strong>SAE International - Padr\u00f5es de tratamento de superf\u00edcie<\/strong> <a class=\"underline\" href=\"https:\/\/www.sae.org\/\" target=\"_blank\" rel=\"noopener\">https:\/\/www.sae.org\/<\/a><\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>The Complete Guide to Raw Material Testing: Understanding the Main Methods Why Testing Raw Materials Matters Raw materials are the basic parts that make up any product&#8217;s quality, safety, and how well it works. When there are problems with these starting materials &#8211; like differences in quality, unwanted substances, or materials that don&#8217;t meet standards [&hellip;]<\/p>","protected":false},"author":1,"featured_media":2506,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24],"tags":[],"class_list":["post-2504","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-5g-communication-fasteners"],"_links":{"self":[{"href":"https:\/\/productionscrews.com\/pt\/wp-json\/wp\/v2\/posts\/2504","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/productionscrews.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/productionscrews.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/productionscrews.com\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/productionscrews.com\/pt\/wp-json\/wp\/v2\/comments?post=2504"}],"version-history":[{"count":3,"href":"https:\/\/productionscrews.com\/pt\/wp-json\/wp\/v2\/posts\/2504\/revisions"}],"predecessor-version":[{"id":2856,"href":"https:\/\/productionscrews.com\/pt\/wp-json\/wp\/v2\/posts\/2504\/revisions\/2856"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/productionscrews.com\/pt\/wp-json\/wp\/v2\/media\/2506"}],"wp:attachment":[{"href":"https:\/\/productionscrews.com\/pt\/wp-json\/wp\/v2\/media?parent=2504"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/productionscrews.com\/pt\/wp-json\/wp\/v2\/categories?post=2504"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/productionscrews.com\/pt\/wp-json\/wp\/v2\/tags?post=2504"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}