CAJ | 학술논문

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。
기우향량-자공간협각판거결합자외분광광도법，제출료일충직접희석측정장유중산리산갑함량적신방법。해방법통과분별구건장유본저、산리산갑표준품화대측장유양품적자외광보고，운용향량-자공간협각판거측정장유중적산리산갑함량。결과표명：해방법계산결과여고효액상색보법상비상대오차소우4．34％，방법피용우실제양품측정，회수솔위95．00％～104．00％，상대표준편차소우3．00％，해분석결과표명해법은정、준학、간편쾌속、실용령활，가용우식품방부제현장비량정량측정。
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.