Research progress in the detection of grafted silk
In recent years,improper use of grafting treatment in silk product to gain weight has seriously disturbed the healthy de-velopment of silk industry.Therefore,how to detect grafted silk effectively has attracted widespread attention.The commonly used detection methods for grafted silk were reviewed,including chromogenic method,solubility method,nitrogen content determina-tion,spectrometric method,liquid chromatography and thermal analysis.The principle and detection effect of these methods were introduced,and their advantages and disadvantages were analyzed.It is found that infrared spectroscopy and thermal analysis can not only effectively detect grafted silk qualitatively,but also analyze the grafting yield of silk quantitatively;infrared spectroscopy is expected to be used on industrial scale because of its simple operation,strong applicability and rapid detection of large quantities of samples,and it is the future research focus of silk grafting detection technology.