the synergistic chromogenic reaction of nb(v) with both bromopyrogallol red(bpr) and diantipyrylmethane(dam) in the presence of polyvinyl alcohol(pva) is studied.
探讨了在聚乙烯醇(pva)存在下,铌与溴邻苯三酚红及二安替比林甲烷的协同显色反应。
method asterosaponin was prepared separately by extraction with methanol or ethanol and was analysed by chromogenic reaction , hemolytic test , ultraviolet spectrum and thin layer chromatography.
such problems are discussed that low-acidity emerges in the quality analysis of hydrochloric acid and the chromogenic reaction of acidic-analysis indicator doesn′t work.
对盐酸质量分析中出现的酸度低、酸度分析指示剂不显色等问题进行了讨论。
the visible spectrums of victoria pure blue(vpb) and its association complexes were studied, and the chromogenic reaction of vpb with anions was also studied.
研究维多利亚艳蓝(vpb)及其缔合物的可见光谱。研究了vpb与阴离子的显色反应;
the chromogenic reaction between the reagent picramazochrom and cobalt was studied.