quartz tube test for sulfur

例句：

1. 1.The quartz tube test is a crucial step in the process of analyzing crystalline materials.
   石英管试验是分析晶体材料过程中的一个关键步骤。
2. 2. The quartz tube test is used to measure the purity of the material being tested.
   石英管试验用于测量待测材料的纯度。
3. 3.The quartz tube test is an effective method for detecting impurities in the material.
   石英管试验是一种有效的检测材料中杂质的方法。