核磁共振磷谱快速测定可乐饮料中磷酸根  

Rapid determination of phosphate in coke beverages by phosphorus-31 nuclear magnetic resonance(^(31)P-NMR)

作　　者：卢爱民[1] 李小龙 陈敏[1] 杨春龙[1] LU Ai-min;LI Xiao-long;CHEN Min;YANG Chun-long(College of Science, Nanjing Agricultural University, Nanjing 210095;Nanjing Huawei Medicine Technology Development Co. LTD, Nanjing 210033)

机构地区：[1]南京农业大学理学院,南京210095 [2]南京华威医药科技集团有限公司,南京210033

出　　处：《分析试验室》2018年第5期604-606,共3页Chinese Journal of Analysis Laboratory

摘　　要：建立了核磁共振磷谱(^(31)P-NMR)快速测定可乐饮料中的磷酸根含量的定量分析方法。以磷酸二氢钾(KH_2PO_4)配制标准工作溶液,在0.25~4 mg/m L浓度范围内,具有良好的线性关系。将该方法用于可乐中磷酸根含量的测定,测得可口可乐和百事可乐中的磷酸根的含量分别为0.8462 mg/m L和0.9084 mg/m L,相对标准偏差为0.44%和0.46%,加标回收率在96.4%~109.7%。A rapid and quantitative method has been established to determine phosphate in Coke beverages by phosphorus-31 nuclear magnetic resonance（^31P-NMR）. The standard curve prepared with potassium dihydrogen phosphate（ KH2PO4） had a good linear relationship in the concentration range of0. 25 to 4 mg/m L. The phosphate in Coke beverages was determined by this method. The concentrations of phosphate in Coca Cola and Pepsi Cola were 0. 8462 mg/m L and 0. 9084 mg/m L,respectively,the RSDs were 0. 44% and 0. 46%,and the recoveries were between 96. 4% and 109. 7%.

关 键 词：核磁共振磷谱(^31P-NMR) 可乐饮料 磷酸根 

分 类 号：TS274[轻工技术与工程—农产品加工及贮藏工程] O657.61[轻工技术与工程—食品科学与工程]