Determination of palladium in acetaldehyde catalyst solution can avoid the use of the toxic reagent, so it can improve working environment, and shorten analysis time.
采用原子吸收法分析乙醛催化剂溶液中的钯含量，使分析工作者避免接触有毒试剂，改善了工作环境，又缩短了分析时间。
The method is improved for measuring formaldehyde in air by the method of pararosaniline hydrochloride using toxic mercury reagent.
盐酸副玫瑰苯胺法测定空气中甲醛，使用了有毒的汞试剂，为此对该法进行了改进。
The method is improved for measuring formaldehyde in air by the method of pararosaniline hydrochloride using toxic mercury reagent.
盐酸副玫瑰苯胺法测定空气中甲醛，使用了有毒的汞试剂，为此对该法进行了改进。
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