微分脉冲极谱法测定牛奶中的总碘含量。
Differential pulse polarographic determination of total iodine in milk.
作者信息
Curtis A R, Hamming P
出版信息
J Assoc Off Anal Chem. 1982 Jan;65(1):20-3.
PMID:7056691
Abstract
A differential pulse polarographic method for total iodine in milk is presented. Samples are ashed, sodium hypochlorite is added to oxidize iodide to iodate, and the product is mixed with sodium sulfite solution and measured by differential pulse polarography at -90 V against SCE. The standard deviation for 53 duplicate samples was 0.011. Average recovery for 10 or more samples at different levels was 98.6% with a standard deviation of 2.9%.
摘要
本文提出了一种测定牛奶中总碘的微分脉冲极谱法。将样品灰化，加入次氯酸钠将碘化物氧化为碘酸盐，产物与亚硫酸钠溶液混合，在相对于饱和甘汞电极（SCE）为 -90 V 的条件下通过微分脉冲极谱法进行测定。53 个重复样品的标准偏差为 0.011。不同水平下 10 个或更多样品的平均回收率为 98.6%，标准偏差为 2.9%。
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