TY - JOUR
T1 - CODEX-compliant eleven organophosphorus pesticides screening in multiple commodities using headspace-solid phase microextraction-gas chromatography-mass spectrometry
AU - Sang, Zi Ye
AU - Wang, Yu Ting
AU - Tsoi, Yeuk Ki
AU - Leung, Kelvin Sze Yin
N1 - Funding Information:
K.S.-Y. Leung thanks the Faculty Research Grant (FRG2/11-12/040) from Hong Kong Baptist University for financial support.
PY - 2013/1/15
Y1 - 2013/1/15
N2 - A headspace-solid phase microextraction-gas chromatography-mass spectrometric (HS-SPME-GC-MS, hereafter abbreviated as "SPME") method was developed for dedicated organophosphorus (OP) pesticides assessment in multiple vegetable and fruit commodities. Specific extraction variables were optimised to achieve harmonised extraction performance of eleven OPs in a great span of seven characteristic commodities cataloged in Codex Alimentarius Commission. Comprehensive validation study confirmed analytical robustness of the SPME treatment in turnip, green cabbage, French beans, eggplant, apple, nectarine and grapes. Based on range-specific evaluation, extraction of individual OPs was characterised by sub-ppb level sensitivity and a wide 0.01-2.5 mg L-1 dynamic range. Effective sample clean-up afforded precise quantification (0.5-10.9% R.S.D.) within a 70-120% recovery range at the MRL levels specified for individual commodities. Compared to conventional methods currently used, the SPME treatment developed here is quick, accurate, and relatively environmental friendly; it represents an attractive, practical way to deliver international standards in OP screening routines.
AB - A headspace-solid phase microextraction-gas chromatography-mass spectrometric (HS-SPME-GC-MS, hereafter abbreviated as "SPME") method was developed for dedicated organophosphorus (OP) pesticides assessment in multiple vegetable and fruit commodities. Specific extraction variables were optimised to achieve harmonised extraction performance of eleven OPs in a great span of seven characteristic commodities cataloged in Codex Alimentarius Commission. Comprehensive validation study confirmed analytical robustness of the SPME treatment in turnip, green cabbage, French beans, eggplant, apple, nectarine and grapes. Based on range-specific evaluation, extraction of individual OPs was characterised by sub-ppb level sensitivity and a wide 0.01-2.5 mg L-1 dynamic range. Effective sample clean-up afforded precise quantification (0.5-10.9% R.S.D.) within a 70-120% recovery range at the MRL levels specified for individual commodities. Compared to conventional methods currently used, the SPME treatment developed here is quick, accurate, and relatively environmental friendly; it represents an attractive, practical way to deliver international standards in OP screening routines.
KW - Codex Alimentarius Commission
KW - GC-MS
KW - Organophosphorus pesticides
KW - Solid phase microextraction
UR - http://www.scopus.com/inward/record.url?scp=84866872592&partnerID=8YFLogxK
U2 - 10.1016/j.foodchem.2012.08.060
DO - 10.1016/j.foodchem.2012.08.060
M3 - Journal article
C2 - 23122118
AN - SCOPUS:84866872592
SN - 0308-8146
VL - 136
SP - 710
EP - 717
JO - Food Chemistry
JF - Food Chemistry
IS - 2
ER -