xylenol orange

Mixed color reagent of xylenol orange and phenanthroline were used as a selective chromogenic system in pH2.8 with the presence of Emulsifying agent OP, The application of H-point standard additions method to the simultaneous determination of Fe(ⅱ) and Fe(ⅲ) was studied.

pH2.8时，二甲酚橙-邻菲罗啉混合显色剂中加入乳化剂OP，采用H点标准加入法-分光光度法同时测定水中的Fe（Ⅱ）和Fe（Ⅲ）。

Thus the tin was released from the plating bath using 2.5 g ammonium fluoride as the releasing agent in a acetic-pyridine buffer solution of a pH value 5.5, and then inversely titrated using zinc nitrate standard solution in the presence of xylenol orange as an indicator.

在pH值为5.5的醋酸吡啶缓冲溶液中，用2.5gNH4F解蔽，4滴XO、1mLCPB指示终点，锌盐返滴定镀液中的锡。

By studying the impact of the optimal absorption wavelength, the amount of xylenol orange, the amount of phenanthroline, the optimal pH and the amount of hexamethylenetetramine, we established a xylenol orange spectrophotometry of measuring lead. 2.

研究了最佳吸收波长，二甲酚橙的用量，邻二氮菲的用量，最佳pH及六次甲基四胺的用量等因素的影响，建立了测定铅的二甲酚橙分光光度法。

Studies on Thermochromic Properties of the lanthanide chelates(ⅱ)& thermochromism and mechanism of la, nd and Gd chelates with xylenol orange in aqueous solutions

镧系元素螯合物热致变色作用的研究（Ⅱ）镧、钕、钆二甲酚橙螯合物水溶液的热致变色作用及机理

The chelates of xylenol orange containing hydrophile groups are not sorbed by the resin.

而含有亲水基团的二甲酚橙螯合物不被树脂吸附。