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本文报导了Bi-XO-CPC三元显色体系,在pH5时,于560nm波长处,络合物有最大吸收,0～1.2μgBiml~(-1)遵循比尔定律。ε_(560)=4.35×10~4,灵敏度指数为0.0048μgBi/cm~2。若显色前用MIBK革取碘-铋络离子,井用稀盐酸反萃后再进行光度测定,则可适用于岩石中ppm级铋的测定。
Bi-XO-CPC ternary colorimetric system was reported in this paper. At pH5, the complex has the maximum absorption at 560nm and Beer’s law is obeyed at 0 ~ 1.2μgBim1 ~ (-1). ε 560 = 4.35 × 10 -4, and the sensitivity index is 0.0048 μgBi / cm 2. If the color before using MIBK iodine - bismuth ion, wells and stripped with dilute hydrochloric acid after photometry, it can be applied to the determination of rock bismuth ppm level.