论文部分内容阅读
2,6,7-三羟基-9-[4-(8-羟基与喹啉)-偶氮基)苯基]萤光酮,简称-HQA-PF,是一种新显色剂。-HQA-PF在弱酸性介质中,有表面活性剂CPB存在下,与Sb(Ⅱ)形成稳定的三元络合物,其最大波长在562nm处,锑量在0.5～9pg/25ml范围符合比耳定律,求算表观摩尔吸光系数ε＇_(562)=2.55×10~5L·mol~(-1)·cm~(-1),用双峰双波长法测定,相应的表观摩尔吸光系数ε＇_(562-504)=3.34×10~5L·mol~(-1)·cm~(-1),较单波长法提高约30％。用拟定的实验方法,进行化探样品中痕量锑的测定,结果满意。
2,6,7-trihydroxy-9- [4- (8-hydroxy and quinoline) -azo) phenyl] fluorone, referred to as -HQA-PF, is a new developer. -HQA-PF forms a stable ternary complex with Sb (II) in the presence of surfactant CPB in a mildly acidic medium at a maximum wavelength of 562 nm with an antimony content in the range of 0.5-9 pg / 25 ml Ear law, the apparent molar absorptivity ε ’_ (562) = 2.55 × 10 ~ 5L · mol -1 (-1) · cm -1 was calculated and the corresponding apparent molar ratio The extinction coefficient ε ’_ (562-504) = 3.34 × 10 ~ 5L · mol -1 (-1) cm -1, which is about 30% higher than the single wavelength method. With the proposed experimental method for the determination of trace antimony in geochemical samples, the results are satisfactory.