A new spectrophotometric method for the determination of trace nitrite was studied. The method is based on the diazo - reaction of methylene violet with nitrite in hydrochloric acid medium.
研究了在盐酸介质中微量亚硝酸根与亚甲紫发生的重氮化反应，建立了测定微量亚硝酸根的新方法。
The article attempted to research into the conditions and affecting factors concerning the determination of Arsanilic acid by way of ultra-violet spectrophotometry.
本文对阿散酸的紫外分光光度的吸收光谱曲线、测定条件及影响因素进行了探讨。
This paper chose some kinds of carboxylic acid as the solvent and a series of crystal violet-boric acid reversible thermochromic paints were prepared by solid phase synthesis method.
选用羧酸类溶剂，采用固相法合成了结晶紫-硼酸系列可逆热致变色材料。
This paper chose some kinds of carboxylic acid as the solvent and a series of crystal violet-boric acid reversible thermochromic paints were prepared by solid phase synthesis method.
选用羧酸类溶剂，采用固相法合成了结晶紫-硼酸系列可逆热致变色材料。
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