This document provides step-by-step descriptions of recommended test methods for identity purity and content together with a detailed list of the necessary reagents and solutions.

本文件对推荐使用的纯度与含量测定检测方法一步步进行了详细说明，并附列一张必要的试剂和溶剂详细清单。

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Unbound and hydraulically bound mixtures - Part 4: test methods for laboratory reference density and water content - Vibrating hammer.

松散的和液力粘合的混合料。第4部分：实验室参考密度和水含量的测试方法。振动锤。

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Applying principle, test methods and fluorine content data of fluorocarbon polymers are reviewed. The influence of fluorine content on the durability of fluorocarbon coatings is analyzed.

综述了含氟聚合物的应用原理、测试方法及氟含量，分析了氟含量对氟涂料耐久性的影响。

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The researchers used several methods to test the nickel content of 66 ear studs and earring backs imported into Finland from Germany, Sweden, Britain and the US - all of which were said to contain amounts of nickel well below the EU limits.

BBC: Earring