摘要
采用原子吸收光谱法测定山茶油中金属元素钙、铜、锌的含量,并分别从样品制备过程中产生的不确定度、标准储备液稀释过程引入的不确定度、最小二乘法拟合校准曲线产生的不确定度、重复性实验引入的不确定度4个主要方面进行不确定度分量的计算,最后整体合成相对标准不确定度。结果表明:当山茶油中钙含量为49.54 mg/kg时,测定结果的不确定度为6.084 mg/kg;当山茶油中铜含量为0.972 mg/kg时,测定结果的不确定度为0.331 4 mg/kg;当山茶油中锌含量为36.44 mg/kg时,测定结果的不确定度为3.097 4 mg/kg。
The contents of metal elements calcium, copper and zinc in oil-tea camellia seed oil were determined by atomic absorption spectrometry and four main aspects of uncertainty including the sample preparation process, the dilution process of standard stock solution, the least squares method to fit the calibration curve generated and repetitive experiments were calculated. Finally, the overall synthesis of relative standard uncertainty was calculated. The results showed that when calcium content in oil-tea camellia seed oil was 49.54 mg/kg, the uncertainty of determination result was 6.084 mg/kg; when copper content in oil-tea camellia seed oil was 0.972 mg/kg, the uncertainty of determination result was 0.331 4 mg/kg; when zinc content in oil-tea camellia seed oil was 36.44 mg/kg, the uncertainty of determination result was 3.097 4 mg/kg.
出处
《中国油脂》
CAS
CSCD
北大核心
2017年第12期137-141,共5页
China Oils and Fats
基金
湖南省高校产业化培育项目(13CY029)
湖南省自然科学基金项目(2016JJ4035)
湖南省教育厅优秀青年项目(15B095)
湖南省创新团队项目(2012-318)
关键词
山茶油
钙
铜
锌
原子吸收光谱法
不确定度
oil - tea camellia seed oil
calcium
copper
zinc
atomic absorption spectrometry
uncertainty
