Sato S, Iwamoto M, Uchikawa S
Faculty of Education, Kumamoto University, 2-40-1, Kurokami, Kumamoto 860, Japan.
Talanta. 1987 Apr;34(4):419-22. doi: 10.1016/0039-9140(87)80063-2.
Molybdenum(VI) reacts with p-chloromandelic acid to form a complex extractable into chlorobenzene with Malachite Green, from aqueous solution at pH 2.0-4.0 at room temperature, and can then be determined indirectly by measuring the absorbance of the Malachite Green in the extract, at 630 nm. The calibation graph is linear for molybdenum over the range 0.26-10.0 x 10(-6)M (0.10-4.0 mug); the apparent molar absorptivity is 1.06 x 10(5) l.mole(-1).cm(-1). The method has been applied to the determination of molybdenum in mild steels with satisfactory results.
在室温下，pH为2.0 - 4.0的水溶液中，钼（VI）与对氯扁桃酸反应形成一种络合物，该络合物可与孔雀石绿一起被萃取到氯苯中，然后通过测量萃取液中孔雀石绿在630nm处的吸光度来间接测定钼。钼在0.26 - 10.0×10⁻⁶M（0.10 - 4.0μg）范围内校准曲线呈线性；表观摩尔吸光系数为1.06×10⁵ l·mol⁻¹·cm⁻¹。该方法已应用于低碳钢中钼的测定，结果令人满意。
