近红外光谱法快速筛查减肥类保健品中的咖啡因

Rapid Screening of Caffeine in Weight-reducing Health Product by Near-infrared Spectroscopy

用近红外光谱法建立了一种减肥类保健品中咖啡因的快速筛查方法。以15种市售减肥类保健品为研究对象,采用甲醇萃取,采集萃取液的近红外透射光谱图,利用TQ Analyst 9. 0软件,采用化学计量学的判别分析法建立了减肥类保健品中咖啡因的快速筛查模型。用此模型检测了10种市售减肥类保健品,结果表明,含咖啡因的阳性样品、阴性样品识别正确率都为100%,误判数为0。

The method of rapid screening of caffeine in weight-reducing health product was investigated.Taking 15 kinds of weightreducing health products as the object,the sample was extracted by methanol,and the near-infrared transmission spectrum of the extract was collected.The recognition model of caffeine was established using discriminant analysis of chemometric by TQ Analyst 9.0 software.The model was used to detect the 10 samples,and the results showed that the correct recognition rate of model was 100%,and the miscarriage of justice was 0.