论文部分内容阅读
目前在我国野外地质化探分析中,可采用溴邻苯三酚红-邻菲罗啉与银生成蓝色三元络合物,在水溶液中进行比色测定。该法灵敏度高(ε=51000),选择性较好。但其缺点是显色络合物稳定性差,颜色只能稳定半小时,而且测定范围较小(0.02—0.2ppm)。我们在比色溶液中加入少量动物胶和乙醇,10分钟显色完全,可稳定4小时以上。适宜的pH为7±0.5,温度为20—40℃。在显色溶液中
At present, in the field of geological geochemical exploration in our country, bromine pyrogallol red - o-phenanthroline can be used to generate blue ternary complex with silver and colorimetric determination in aqueous solution. The method of high sensitivity (ε = 51000), the selectivity is better. However, its disadvantage is the poor stability of the color complex, the color can only be stable for half an hour, and the measurement range is small (0.02-0.2ppm). We colorimetric solution by adding a small amount of animal glue and ethanol, 10 minutes completely color, can be stable more than 4 hours. The suitable pH is 7 ± 0.5 and the temperature is 20-40 ° C. In the color solution