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  • Title: [Determination of trace zinc in milk using pulse nebulization atomic absorption spectrophotometry technique].
    Author: Ji X, Li X, Liu M.
    Journal: Guang Pu Xue Yu Guang Pu Fen Xi; 1999 Feb; 19(1):87-9. PubMed ID: 15818927.
    Abstract:
    A rapid, diect, pulse nebulization method for the determination of trace zinc in milk by FAAS with model WYX-402A atomic absorption spectrometer is described. The influence of pulse nebulization volume, uptake rate of solution and other factors on the uptake signal has been discussed. The milk sample was diluted with 1.5% HCl solution. A 100 microL aliquot of the solution was then nebulied and the peak height of the transient output pulse was monitored. The result of the determination of the 1+4 diluted sample is in agreement with that of digested sample with HNO3-HClO4. The average recovery of 99.0% with relative standard deviation of 3.3% was achieved and the detection limit was 0.028 microg/mL. The method is simple, rapid, accurate and precise.
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