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基于在 OP存在下 ,痕量 Cr( )可使萘酚绿 B退色的反应 ,本文提出了一种应用新的退色光度法测定痕量 Cr( )的方法。该方法线性范围为 0 .2 4— 3.0 0μg· m L- 1 ,检出限为 2 .0 5μg· m L- 1 。该方法用于模拟样品的测定 ,回收率为 10 0 %— 10 8%。
Based on the reaction of trace amount of Cr () in the presence of OP to fade naphthol green B, a new method for the determination of trace Cr (Ⅵ) using a new fading spectrophotometry was proposed. The linear range of this method is 0.2-2.0 ~ 3.0 μg · mL -1 with a detection limit of 2.5 μg · mL -1. The method was used to simulate the determination of the sample, the recovery rate of 10 0% - 108%.