摘要
基于向量-子空间夹角判据结合紫外分光光度法，提出了一种直接稀释测定酱油中山梨酸钾含量的新方法。该方法通过分别构建酱油本底、山梨酸钾标准品和待测酱油样品的紫外光谱库，运用向量-子空间夹角判据测定酱油中的山梨酸钾含量。结果表明：该方法计算结果与高效液相色谱法相比相对误差小于4．34％，方法被用于实际样品测定，回收率为95．00％～104．00％，相对标准偏差小于3．00％，该分析结果表明该法稳定、准确、简便快速、实用灵活，可用于食品防腐剂现场批量定量测定。
A new direct determination of potassium sorbate in soy sauce is established based on the vec-tor-subspace angle criterion and the UV spectrophotometer.In the study,three multi-wavelength UV spectral libraries,including background of soy sauce,potassium sorbate standard samples and soy sauce samples are respectively constructed to compute the content of potassium sorbate in soy sauce by using vector-subspace angle criterion.The result shows that compared with the result of high per-formance liquid chromatography,the relative error of the result of vector-space angle criterion is less than 4.34%,the recoveries of potassium sorbate are 95.00%~104.00%,the relative standard devia-tion （n= 4）is less than 3.00%.The analysis result shows that the method is stable,accurate,sim-ple,rapid,practical and flexible;it can be used for on-site batch and quantitative determination of food preservatives.
出处
《中国调味品》
CAS
北大核心
2014年第7期103-106,共4页
China Condiment
基金
广西科技计划项目(桂科攻1355010-15)
广西科技大学科技基金(1307104)
广西研究生创新计划项目(2012105940817M04)
