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KS M ISO 2483-2017 Sodium chloride for industrial use. Determination of the loss of mass at 110 degrees C
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2024-03-14 19:30:02浏览：15
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KS K0731-2017 Test method for the determination of extractable heavy metals in textiles
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2024-03-14 13:45:01浏览：21
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ISO 10471-2018 玻璃增强热固性塑料(GRP)管--湿条件下长期极限弯曲应变和长期极限相对环挠度的测定 Glass-reinforced thermosetting plastics (GRP) pipes — Determination of the long-term ultimate bending strain and the long-term ultimate relative ring deflection under wet conditions
This document specifies a method for determining by extrapolation the long-term ultimate ring bending strain and the calculation of the long-term ultimate relative ring deflection of glass-reinforced thermosetting plastics (GRP) pipes, under wet conditions.<br />Two methods of loading are given, one using plates the other beam bars....
2024-03-14 05:15:01浏览：17
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IEC 62321-4-2017 电工产品中某些物质的测定--第4部分:用CV-AAS、CV-AFS、ICP-OES和ICP-MS测定聚合物、金属和电子设备中的汞 Determination of certain substances in electrotechnical products – Part 4: Mercury in polymers, metals and electronics by CV-AAS, CV-AFS, ICP-OES and ICP-MS
This part of IEC 62321 describes test methods for mercury in polymers, metals and electronics by CV-AAS, CV-AFS, ICP-OES and ICP-MS. <br />This standard specifies the determination of the levels of mercury (Hg) contained in electrotechnical products. These materials are polymers, metals and electronics (e.g. printed wiring boards, fluorescent lamps, mercury switches). Batteries containing Hg should be handled as described in [1] . The interlaboratory study has only evaluated these test methods for plastics, other matrices were not covered. <br />This standard refers to the sample as the object to be processed and measured. What the sample is or how to get to the sample is defined by the entity carrying out the tests. Further guidance on obtaining representative samples from finished electronic products to be tested for levels of regulated substances may be found in IEC 62321-2. It is noted that the selection and/or determination of the sample may affect the interpretation of the test results. <br />This standard describes the use of four methods, namely CV-AAS (cold vapour atomic absorption spectrometry), CV-AFS (cold vapour atomic fluorescence spectrometry) ICP-OES (inductively coupled plasma optical emission spectrometry), and ICP-MS (inductively coupled plasma mass spectrometry) as well as several procedures for preparing the sample solution from which the most appropriate method of analysis can be selected by experts. <br />Analysis by CV-AAS, CV-AFS, ICP-OES and ICP-MS allows the determination of the target element, mercury, with high precision (uncertainty in the low per cent range) and/or high sensitivity (down to the µg/kg level). The test procedures described in this standard are intended to provide the highest level of accuracy and precision for concentrations of mercury in the range from 4 mg/kg to 1 000 mg/kg. The procedures are not limited for higher concentrations. <br />For direct analysis, using thermal decomposition-gold amalgamation in conjunction with CV-AAS (TD(G)-AAS) can be also applied for mercury analysis without sample digestion, although the detection limits are higher than other methods due to the reduced sample size. <br /> ...
2024-03-05 10:45:01浏览：14
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KS E ISO 3852-2008 Iron Ores For Blast Furnace And Direct Reduction Feedstocks－Determination Of Bulk Density
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斗七仝宁xF 24E19- 4440t a}4.
1 000 kg/m3=1 ton/m3=1 kg/L
8.2 入一荆aj4=1 i2i:'I(acceptance)蚪 xH 4'i (repeatability)
T,-ki A°1l 4E}4 L...2024-03-05 06:00:01浏览：16
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YB/T 4582.4-2017 氮化硅铁 硫含量的测定 红外线吸收法 Ferrosilicon nitride-Determination of sulfur content-Infrared absorption method
本部分规定了采用红外线吸收法测定硫含量。<br />本部分适用于氮化硅铁中硫含量测定，测定范围（质量分数）:0.005%~0.050%。...
2024-03-04 21:30:01浏览：22
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