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研究了非离子表面活性剂Triton X-100存在下,新试剂联苯基双荧光酮与钼的显色反应条件,结果表明:在pH为5.1的HAc-NaAc缓冲溶液中,试剂与钼形成1∶1的红色配合物,配合物的最大吸收波长为530nm处;表观摩尔吸光系数为ε=1.41×105L.mol-1.cm-1;钼含量在0—15μg/25mL范围内符合比耳定律;多数常见离子不干扰测定,方法灵敏度高,选择性好。拟定方法用于合金钢中微量钼的测定,结果满意。
The reaction conditions of the new reagent, biphenyldiphenylfluorone and molybdenum, were studied in the presence of non-ionic surfactant Triton X-100. The results showed that the reagents reacted with molybdenum in the buffer solution of HAc-NaAc at pH 5.1 : 1 red complex, the maximum absorption wavelength of the complex is 530nm; the apparent molar absorptivity is ε = 1.41 × 105L.mol-1.cm-1; the content of molybdenum is in the range of 0-15μg / 25mL, Law; most common ions do not interfere with the determination, the method of high sensitivity, good selectivity. The proposed method was applied to the determination of trace molybdenum in alloy steel with satisfactory results.