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应用双硫腙法测汞,灵敏度较高,准确性和重现性也较好,是一个常用的方法。近年来,国内对此法作了不少改进,但实验操作仍嫌冗长,试剂用量多,费事费时,有必要进一步改进。 Kimura和Miller提出由氯化亚锡还原出来的金属汞可经吹气分离和富集,最后用双硫腙测定。他们把汞从待测溶液中分离出来,免去调整酸度、来回萃取等步骤,提高了工效。但在他们给定的条件
Application of dithizone method mercury, high sensitivity, accuracy and reproducibility is also good, is a commonly used method. In recent years, many improvements have been made to this method in China, but the experimental operation is still too long, the amount of reagents used, the time-consuming and time consuming, and the need for further improvement. Kimura and Miller proposed that metallic mercury reduced by stannous chloride can be separated and enriched by air blowing and finally measured by dithizone. They separate the mercury from the solution to be tested, eliminating the need for adjustments to acidity, back and forth extraction and other steps to improve work efficiency. But under the conditions given to them