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Analysis of agricultural residues on tea using d-SPE sample preparation with GC-NCI-MS and UHPLC-MS/MS.
J Agric Food Chem. 2010 Nov 24; 58(22):11553-60.JA

Abstract

This study presents new sample preparation and analytical procedures for the quantification of pesticides on processed tea leaves. The new method includes tea extraction and dispersive solid phase extraction (d-SPE) to prepare gas chromatography (GC) and ultrahigh-performance liquid chromatography (UHPLC)-ready samples, providing a fast and cost-effective solution for time-sensitive industrial analysis to fulfill regulatory requirements. Both GC-negative chemical ionization mass spectrometry (GC-NCI-MS) and UHPLC-tandem mass spectrometry (UHPLC-MS/MS) were employed to produce highly sensitive and reproducible data. Excellent limits of detection (typically below 1 μg/kg for GC and 10 μg/kg for UHPLC), wide linearity ranges, and good recoveries (mostly >70%) were achieved on the selected pesticides. Twenty-seven tea samples purchased from local grocery stores were analyzed using the newly developed methods. Among the pesticides analyzed, endosulfan sulfate and kelthane were the most frequently detected by GC-NCI-MS and imidacloprid and acetamiprid by UHPLC-MS/MS in these teas. The samples were found to be relatively clean, with <1 mg/kg of total pesticide residues. The organic-labeled teas were significantly cleaner than nonorganic ones. The cost per gram of tea did not correlate with pesticide residue levels detected.

Authors+Show Affiliations

Ingredient Quality Department, The Coca-Cola Company, 1 Coca-Cola Plaza, Atlanta, Georgia 30313, United States.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Evaluation Study
Journal Article

Language

eng

PubMed ID

20961040

Citation

Zhang, Xian, et al. "Analysis of Agricultural Residues On Tea Using d-SPE Sample Preparation With GC-NCI-MS and UHPLC-MS/MS." Journal of Agricultural and Food Chemistry, vol. 58, no. 22, 2010, pp. 11553-60.
Zhang X, Mobley N, Zhang J, et al. Analysis of agricultural residues on tea using d-SPE sample preparation with GC-NCI-MS and UHPLC-MS/MS. J Agric Food Chem. 2010;58(22):11553-60.
Zhang, X., Mobley, N., Zhang, J., Zheng, X., Lu, L., Ragin, O., & Smith, C. J. (2010). Analysis of agricultural residues on tea using d-SPE sample preparation with GC-NCI-MS and UHPLC-MS/MS. Journal of Agricultural and Food Chemistry, 58(22), 11553-60. https://doi.org/10.1021/jf102476m
Zhang X, et al. Analysis of Agricultural Residues On Tea Using d-SPE Sample Preparation With GC-NCI-MS and UHPLC-MS/MS. J Agric Food Chem. 2010 Nov 24;58(22):11553-60. PubMed PMID: 20961040.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Analysis of agricultural residues on tea using d-SPE sample preparation with GC-NCI-MS and UHPLC-MS/MS. AU - Zhang,Xian, AU - Mobley,Nicole, AU - Zhang,Jiugen, AU - Zheng,Xiaomin, AU - Lu,Ling, AU - Ragin,Oscar, AU - Smith,Christopher J, Y1 - 2010/10/20/ PY - 2010/10/22/entrez PY - 2010/10/22/pubmed PY - 2011/3/2/medline SP - 11553 EP - 60 JF - Journal of agricultural and food chemistry JO - J Agric Food Chem VL - 58 IS - 22 N2 - This study presents new sample preparation and analytical procedures for the quantification of pesticides on processed tea leaves. The new method includes tea extraction and dispersive solid phase extraction (d-SPE) to prepare gas chromatography (GC) and ultrahigh-performance liquid chromatography (UHPLC)-ready samples, providing a fast and cost-effective solution for time-sensitive industrial analysis to fulfill regulatory requirements. Both GC-negative chemical ionization mass spectrometry (GC-NCI-MS) and UHPLC-tandem mass spectrometry (UHPLC-MS/MS) were employed to produce highly sensitive and reproducible data. Excellent limits of detection (typically below 1 μg/kg for GC and 10 μg/kg for UHPLC), wide linearity ranges, and good recoveries (mostly >70%) were achieved on the selected pesticides. Twenty-seven tea samples purchased from local grocery stores were analyzed using the newly developed methods. Among the pesticides analyzed, endosulfan sulfate and kelthane were the most frequently detected by GC-NCI-MS and imidacloprid and acetamiprid by UHPLC-MS/MS in these teas. The samples were found to be relatively clean, with <1 mg/kg of total pesticide residues. The organic-labeled teas were significantly cleaner than nonorganic ones. The cost per gram of tea did not correlate with pesticide residue levels detected. SN - 1520-5118 UR - https://www.unboundmedicine.com/medline/citation/20961040/Analysis_of_agricultural_residues_on_tea_using_d_SPE_sample_preparation_with_GC_NCI_MS_and_UHPLC_MS/MS_ L2 - https://doi.org/10.1021/jf102476m DB - PRIME DP - Unbound Medicine ER -