For the standard analytical method, the series of standard solution for the determination of As, se and Hg in water by atomic fluorescence spectrophotometry must be prepared for every test.
在标准分析方法中，采用原子荧光分光光度法测定水中砷、硒、汞所用的标准溶液系列必须每次配制，给工作带来很大的不方便。
The experimental instrument, sample preparation and determination method of the trace element Se in solution by total reflection X-ray fluorescence analysis are described in this paper.
本文叙述了用全反射X荧光分析方法测定溶液中微量硒的实验装置、制样技术和测定方法。
This paper discusses the method of manufacture and application of high-grade SE-40type fat liquor.
本文论述了高档合成皮革加脂剂SE-40的制造与应用方法。
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