The new method in the determination of negative ion surface-active agent is introduced, comparing with methylene blue method, it have merits of simple operation step and little dosage.
介绍了水中阴离子表面活性剂测定新方法，该法与亚甲蓝法比较，具有操作步骤简单，萃取剂用量少的优点。
The method of preparing cobalt blue pigment in the liquid phase was studied by using urea as homogeneous precipitating agent.
研究了用尿素为均匀沉淀剂，在液相中制备钴蓝颜料的方法。
Content of the products were quantitatively determined by two-phase chemical titration using bromophenol blue as the indicator and dichloroethane as the phase splitting agent.
以溴酚蓝为指示剂、二氯乙烷为分散相两相化学滴定法测定产物的含量。
This invention relates to a biological agent testing blue tongue of animals and its preparation method.
本发明涉及一种对动物蓝舌病进行检测的生物制剂以及这种生物制剂的制备方法。
Flavoring agent: color diversification into red series, yellow series, blue series, green series, purple series, transparent colors, etc.
芳香剂：色彩多样化，分为红系列、黄系列、蓝系列、绿系列、紫系列、透明等艳丽色彩。
Flavoring agent: color diversification into red series, yellow series, blue series, green series, purple series, transparent colors, etc.
芳香剂：色彩多样化，分为红系列、黄系列、蓝系列、绿系列、紫系列、透明等艳丽色彩。
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