Using L-half leucine to improve the conditions of tin hydride generation

The determination of tin by hydride generation-atomic spectroscopy has high sensitivity, but the reaction acidity range for the reduction of Sn2 + to SnH4 by potassium borohydride (sodium) is very narrow, and it is susceptible to the interference of coexisting ions. The experimental conditions are very harsh. L-cysteine ​​improves the quenching hydride reaction conditions, significantly broadens the optimal acidity range of the reaction, improves the atomic fluorescence signal of tin, eliminates the co-existence of certain coexisting ions, and on this basis, established a flow injection A new method for determination of trace tin in low alloy steel by hydride generation and atomic fluorescence method.

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