In order to improve the accuracy of laboratory test results, the uncertainty determination of cyanide content in liquor was evaluated by spectrophotometry. According to the method of national standard GB 5009.36—2016 Food Safety National Standard for Determination of Cyanide in Food, the whole experimental process was evaluated. The main sources of uncertainty in evaluation process were the measurement repeatability, sampling volume, sample constant volume, standard solution series, standard curve fitting, alcoholicity conversion and molar mass. The uncertainty of cyanide in liquor was evaluated as X=(2.19±0.06) mg/L; k=2, and the contribution of uncertainty were: measurement repeatability 15.2%, sampling volume 9.2%, sample coloring constant volume 17.8%, standard solution series 39.2%, standard curve fitting 17.4%, alcoholicity conversion 0.5%, molar mass 0.6%, of which the standard solution series contributed the most to the uncertainty.
DU Yun
,
WANG Kaiyu
,
ZUO Huijun
,
QIU Yijun
,
ZHANG Luyue
. Evaluation of uncertainty in determination of cyanide in liquor by spectrophotometry[J]. Food and Fermentation Industries, 2020
, 46(8)
: 273
-279
.
DOI: 10.13995/j.cnki.11-1802/ts.022786
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