Sulphar and chlorine in industrial circulate water were determined by XRF with the spectrum purereagent, in helium light way.
以光谱纯试剂做标准系列，氦气光路，X RF法测定工业循环水中硫和氯。
2
A chemical produced in comparatively small quantities and in a relatively pure state. Pharmaceutical and biological products, perfumes, photographic chemicals, and reagent chemicals are examples.
产量相对较少和较纯态的化学品，例如医药和生物制品、香料、照相药品和试剂化学品。
3
Pure water is taken as blank reagent (control) based on the result of GC-MS test;