直接进样火焰原子吸收光谱法测定白酒中钙

doi:10.7506/spkx1002-6630-201124047

食品科学 ›› 2011, Vol. 32 ›› Issue (24): 224-227.doi: 10.7506/spkx1002-6630-201124047

直接进样火焰原子吸收光谱法测定白酒中钙

刘全德，陈尚龙，李勇，郑毅，黄小冬，王锋

徐州工程学院食品工程学院

出版日期:2011-12-25 发布日期:2011-12-29
基金资助:
江苏省高校自然科学基金项目(10KJD550004)

Determination of Calcium in Chinese Distillate Spirits Using Direct Sampling-Flame Atomic Absorption Spectrophotometry

LIU Quan-de，CHEN Shang-long，LI Yong，ZHENG Yi，HUANG Xiao-dong，WANG Feng

(College of Food Engineering, Xuzhou Institute of Technology, Xuzhou 221008, China)

Online:2011-12-25 Published:2011-12-29

摘要/Abstract

摘要： 建立采用标准曲线法进行定量，火焰原子吸收光谱法(flame atomic absorption spectrophotometry，FAAS)直接进样测定白酒中钙的方法。探讨反应体系、释放剂浓度、乙炔流量以及燃烧器高度对吸光度的影响，比较两种定量方式对测定结果的影响。结果表明，利用体积分数50%乙醇溶液作为标准酒样可以有效地消除因匹配而产生的误差，因此，实验选择标准曲线法作为定量方式。在最佳的实验条件下，钙的线性范围为0.2～8μg/mL，检出限为0.17μg/mL，白酒中钙的质量浓度为9.73μg/mL，精密度为2.04%，加标平均回收率为101.5%，RSD为2.73%。该方法直接、快速、准确、稳定，具有较高的实用价值。

关键词: 直接进样, 火焰原子吸收分光光度法(FAAS), 白酒, 钙

Abstract: A flame atomic absorption spectrophotometric (FAAS) method to determine calcium in Chinese distillate spirits was presented without the need for sample pretreatment. The effects of reaction system composition, releasing agent concentration, acetylene flow rate and burner height on the absorbance at 422.7 nm of the reaction system were explored. Quantification methods such as standard curve method and standard addition method were compared for their effects on calcium quantification. Our results illustrated that the error caused by incompatibility could be eliminated by using 50% aqueous ethanol as standard sample. Therefore, the standard curve method was selected for calcium quantification. Under the optimal conditions, the linear range of quantification of the method was 0.2－8μg/mL, with a detection limit of 0.17μg/mL. The calcium content of a certain commercial sample was determined by the method to be 9.73μg/mL, and the precision RSD for 6 parallel determinations was 2.04%. The average spike recovery across three levels was 101.5% with a relative standard deviation of 2.73%. The method was direct, rapid, accurate and stable and had great value for practical applications.

Key words: direct sampling, flame atomic absorption spectrophotometry, Chinese distillate spirits, calcium

中图分类号:

O657.31

刘全德，陈尚龙，李勇，郑毅，黄小冬，王锋. 直接进样火焰原子吸收光谱法测定白酒中钙[J]. 食品科学, 2011, 32(24): 224-227.

LIU Quan-de，CHEN Shang-long，LI Yong，ZHENG Yi，HUANG Xiao-dong，WANG Feng. Determination of Calcium in Chinese Distillate Spirits Using Direct Sampling-Flame Atomic Absorption Spectrophotometry[J]. FOOD SCIENCE, 2011, 32(24): 224-227.

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直接进样火焰原子吸收光谱法测定白酒中钙

Determination of Calcium in Chinese Distillate Spirits Using Direct Sampling-Flame Atomic Absorption Spectrophotometry

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