流动注射-异烟酸-巴比妥酸法分光光度法测定氰化物的测量不确定度评定

打开文本图片集

摘 要：利用流动注射-异烟酸-巴比妥酸法分光光度法测定地表水中的氰化物，依据数学模型和检测过程的分析确定了测量不确定度的主要贡献因子并进行了评定，对测量结果明确了合理的表达方式。当地表水中氰化物含量为32.23 μg·L-1时，其扩展不确定度为0.78 μg·L-1。

关键词：流动注射-异烟酸-巴比妥酸法分光光度法；氰化物；测量不确定度

Evaluation of Measurement Uncertainty in the Determination of Cyanide by Flow Injection-Isonicotinic-Barbituric Acid Spectrophotometry

DONG Weibo

（Dezhou Rongxi Laboratory Equipment Co.， Ltd.， Dezhou 253000， China）

Abstract： Cyanide in surface water was determined by flow injection-isonicotinic-barbituric acid spectrophotometry. According to the analysis of mathematical model and detection process， the main contribution factors of measurement uncertainty were determined and evaluated， and the reasonable expression of measurement results was defined. When the cyanide content in surface water is 32.23 μg·L-1， its expanded uncertainty is 0.78 μg·L-1.

Keywords： flow injection-isonicotinic-barbituric acid spectrophotometry; cyanide; measurement uncertainty

测量不确定度能很好地表示被测量结果的分散程度，与测量结果密切相关，是以一个范围或区间的形式表示，可适用于其所描述的所有测量值[1-3]。（剩余2298字）