The measurement of 23 organochlorine, organophosphorus, and pyrethroid pesticides in typical traditional Chinese medicine (TCM), flos lonicerae, was made using gel permeation chromatography (GPC) purification and gas ...The measurement of 23 organochlorine, organophosphorus, and pyrethroid pesticides in typical traditional Chinese medicine (TCM), flos lonicerae, was made using gel permeation chromatography (GPC) purification and gas chroma- tography-mass spectrometry (GC-MS) detection. The pesticides were extracted with ultrasonic device and 5.0 mL mixture of ethyl acetate and cyclohexane (1:1, v/v). Coextractants from sample matrices which may have interfere to the qualitative and quantitative analysis, such as pigments, were removed using GPC purification. Simultaneous full scan and selective ion monitor (scan/SIM) mode for GC-MS was used for qualitative and quantitative analysis, which pro- vided retention time and characteristic fragments ratio for each pesticide so as to positively identify each analyte. Rela- tive standard deviations (RSDs) were within 7.7% (5.0 - 22.5 μg/kg, n = 3). The recoveries of pesticide standards at the spiked concentration of 5.0 - 22.5 μg/kg were between 87.1% and 110.9%. Limits of detection (LODs) for the analytes were 0.16 - 3.2 μg/kg, which could meet the demand of routine analysis and TCM quality control.展开更多
Chinese herbal medicines(CHMs)play an increasingly important role in the field of medicine and affects public health in the world.Although more and more strict has been employed to ensure the quality and safety of CHM...Chinese herbal medicines(CHMs)play an increasingly important role in the field of medicine and affects public health in the world.Although more and more strict has been employed to ensure the quality and safety of CHMs,pesticide residues in CHMs remain a serious issue and are the bottleneck for the global development of CHMs.In this work,we applied molecularly imprinted membrane electrospray mass spectrometry(MIM-ESI MS)for rapid detecting 4 classes of pesticide residues in CHMs,including organophosphorus(OPP),carbamates,pyrethroids and neonicotinoids in CHMs.Compared with our previous ambient ionization method MESI,MIM-ESI is capable of achieving a~50-fold increase in the detection limit of conventional analytical methods owing to the specificity recognition and unique enrichment of MIM.The optimal experimental conditions were determined,and the method was further validated for its sensitivity and specificity.Our data showed that MIM-ESI MS is applicable for the direct quantitation of pesticide residues in CHMs.This detection technology may help to ensure the quality of CHMs in the future.展开更多
Chinese herbal medicines(CHMs)are playing important roles in the treatment of diseases and human health care throughout the world.However,the extrinsic harmful residues have been threatening the therapies by destroy...Chinese herbal medicines(CHMs)are playing important roles in the treatment of diseases and human health care throughout the world.However,the extrinsic harmful residues have been threatening the therapies by destroying CHMs qualtiy which hinders the international trades of CHMs.This review summarized the extrinsic harmful residues contaminating CHMs in types,detection methods,national and international regulations,and made safety evaluations according to their contaminated levels,aiming to establish understanding among nations or organizations and provide references for the formulation or amendment of relative regulations.展开更多
AIM To compare the pesticide hexachlorocyclohexane (BHC), dichlorodiphenyl trichloroethane (DDT) and pentachloronitrobenzene (PCNB) contents in 23 kinds of traditional Chinese medicine with the existing limits in the ...AIM To compare the pesticide hexachlorocyclohexane (BHC), dichlorodiphenyl trichloroethane (DDT) and pentachloronitrobenzene (PCNB) contents in 23 kinds of traditional Chinese medicine with the existing limits in the world. METHODS The contents of BHC, DDT and PCNB in 23 kinds of medicinal medicines were determined according to the method given in the addenda IXQ of the Chinese Pharmacopoeia (2000). Average values and standard deviations of every pesticide in every medicinal material and 23 kinds of medicinal materials were obtained. This is the first time to use the percentile statistical technology to make statistics and get the limited values (80% value) of pesticide residues which made 80 percent samples qualified. The probable daily intake of pesticide residues from the traditional Chinese medicine by Chinese adult were calculated according to the dosage of 300 g herbal medicine every day. RESULTS Statistical results showed that the contents of total BHC, total DDT and PCNB in most samples were under the prescriptive standard of the Chinese Pharmacopoeia (2000). Total BHC and total DDT in traditional Chinese medicine with a dosage of 300 g medicinal materials were close to their intake from total food. The sums of total BHC and total DDT from the traditional Chinese medicine and total daily food intake by Chinese adult were much lower than the acceptable daily intake (ADI) values proposed by the FAO/WHO. CONCLUSION The limited standards of pesticide residues in Chinese Pharmacopoeia is reasonable and safe and also suitable for the fact of the traditional Chinese medicine in our country.展开更多
文摘The measurement of 23 organochlorine, organophosphorus, and pyrethroid pesticides in typical traditional Chinese medicine (TCM), flos lonicerae, was made using gel permeation chromatography (GPC) purification and gas chroma- tography-mass spectrometry (GC-MS) detection. The pesticides were extracted with ultrasonic device and 5.0 mL mixture of ethyl acetate and cyclohexane (1:1, v/v). Coextractants from sample matrices which may have interfere to the qualitative and quantitative analysis, such as pigments, were removed using GPC purification. Simultaneous full scan and selective ion monitor (scan/SIM) mode for GC-MS was used for qualitative and quantitative analysis, which pro- vided retention time and characteristic fragments ratio for each pesticide so as to positively identify each analyte. Rela- tive standard deviations (RSDs) were within 7.7% (5.0 - 22.5 μg/kg, n = 3). The recoveries of pesticide standards at the spiked concentration of 5.0 - 22.5 μg/kg were between 87.1% and 110.9%. Limits of detection (LODs) for the analytes were 0.16 - 3.2 μg/kg, which could meet the demand of routine analysis and TCM quality control.
基金supported by the National Natural Science Foundation of China(No.82072247)to MZthe Young Scholar Project of Beijing University of Chinese Medicine(Nos.2019-JYBJS-017 and 2021-JYB-XJSJJ001)to SJ and MZ。
文摘Chinese herbal medicines(CHMs)play an increasingly important role in the field of medicine and affects public health in the world.Although more and more strict has been employed to ensure the quality and safety of CHMs,pesticide residues in CHMs remain a serious issue and are the bottleneck for the global development of CHMs.In this work,we applied molecularly imprinted membrane electrospray mass spectrometry(MIM-ESI MS)for rapid detecting 4 classes of pesticide residues in CHMs,including organophosphorus(OPP),carbamates,pyrethroids and neonicotinoids in CHMs.Compared with our previous ambient ionization method MESI,MIM-ESI is capable of achieving a~50-fold increase in the detection limit of conventional analytical methods owing to the specificity recognition and unique enrichment of MIM.The optimal experimental conditions were determined,and the method was further validated for its sensitivity and specificity.Our data showed that MIM-ESI MS is applicable for the direct quantitation of pesticide residues in CHMs.This detection technology may help to ensure the quality of CHMs in the future.
基金supported by CAMS Innovation Fund for Medical Sciences (No. 2016-I2M-1-012, 2017-I2M-1-013)National Natural Science Foundation of China (No. 81573595, 81703699)National Project for Standardization of Chinese Materia Medica (No. ZYBZH-Y-JIN-34)
文摘Chinese herbal medicines(CHMs)are playing important roles in the treatment of diseases and human health care throughout the world.However,the extrinsic harmful residues have been threatening the therapies by destroying CHMs qualtiy which hinders the international trades of CHMs.This review summarized the extrinsic harmful residues contaminating CHMs in types,detection methods,national and international regulations,and made safety evaluations according to their contaminated levels,aiming to establish understanding among nations or organizations and provide references for the formulation or amendment of relative regulations.
文摘AIM To compare the pesticide hexachlorocyclohexane (BHC), dichlorodiphenyl trichloroethane (DDT) and pentachloronitrobenzene (PCNB) contents in 23 kinds of traditional Chinese medicine with the existing limits in the world. METHODS The contents of BHC, DDT and PCNB in 23 kinds of medicinal medicines were determined according to the method given in the addenda IXQ of the Chinese Pharmacopoeia (2000). Average values and standard deviations of every pesticide in every medicinal material and 23 kinds of medicinal materials were obtained. This is the first time to use the percentile statistical technology to make statistics and get the limited values (80% value) of pesticide residues which made 80 percent samples qualified. The probable daily intake of pesticide residues from the traditional Chinese medicine by Chinese adult were calculated according to the dosage of 300 g herbal medicine every day. RESULTS Statistical results showed that the contents of total BHC, total DDT and PCNB in most samples were under the prescriptive standard of the Chinese Pharmacopoeia (2000). Total BHC and total DDT in traditional Chinese medicine with a dosage of 300 g medicinal materials were close to their intake from total food. The sums of total BHC and total DDT from the traditional Chinese medicine and total daily food intake by Chinese adult were much lower than the acceptable daily intake (ADI) values proposed by the FAO/WHO. CONCLUSION The limited standards of pesticide residues in Chinese Pharmacopoeia is reasonable and safe and also suitable for the fact of the traditional Chinese medicine in our country.