Kahulugan at paggamit

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.

Hakbang 1: Saklaw

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% asupre.

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 Standard Test Method for Determination of Sulfur Content in Cellulosic Materials by X-ray Fluorescence

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 Values expressed in SI units shall be considered standard. Ang mga halaga na ibinigay sa mga panaklong ay para sa sanggunian lamang.

1.6 Ang pamantayang ito ay hindi nilayon upang matugunan ang lahat ng mga alalahanin sa kaligtasan (kung meron man) na nauugnay sa paggamit nito. Responsibilidad ng mga gumagamit ng pamantayang ito na magtatag ng angkop na mga kasanayan sa kaligtasan at kalusugan at upang matukoy ang pagiging angkop ng mga paghihigpit sa regulasyon bago gamitin. For specific hazard descriptions, tingnan sa 7.2.1.