意义及用途

The method provides a non-destructive method for the determination of sulfur content in cellulosic materials. Sulfur can be in the form of sulfate, which can cause thermal instability. Sulfur can also be present as a salt that can cause fog in solution.

步 1: 范围

1.1 The test method includes the determination of the sulphur content of cellulosic materials by X-ray fluorescence.

1.2 Using appropriate standards, the procedure ranges from about 10 ppm to 20% 硫.

1.3 This test method is specifically designed as an alternative to test method D871, sections on procedures and calculations for importance and use, device, reagent, hydroxyl content, and test method D817, an overview of test method, importance and use, device, reagent, and procedure for hydroxyl content. When applied to cellulose esters, it measures the combination of sulfur and sulfur in the accompanying inorganic salts.

ASTM D2929-2011 通过 X 射线荧光测定纤维素材料中硫含量的标准测试方法

1.4 In order to determine the incorporated sulfur, the sample is first reprecipitated into dilute acid to remove the unbound sulfur compounds when soluble.

1.5 以 SI 单位表示的值应被视为标准值. 括号内的数值仅供参考.

1.6 本标准并非旨在解决所有安全问题 (如果有的话) 与其使用相关. 本标准的使用者有责任建立适当的安全和健康实践，并在使用前确定监管限制的适用性. For specific hazard descriptions, 看 7.2.1.