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拟定了在盐酸介质中以偶氮氯瞵Ⅲ分光光度法测定铬,该法酸度高,选择性好,线性范围为0～0.6μg/cm~3,表观摩尔吸光系数为3.03×10~4,应用于合金钢及含铬水泥中微量铬的测定,其测定结果较好。
The method was developed for the determination of chromium in a hydrochloric acid medium with chlorophosphonazo Ⅲ spectrophotometry. The method has the advantages of high acidity and good selectivity. The linear range is 0 ~ 0.6 μg / cm ~ 3 and the apparent molar absorptivity is 3.03 × 10 ~ 4 , Used in the determination of trace chromium in alloy steel and chromium-containing cement, the determination result is better.