Sediment matrix induced response enhancement in the gas chromatographic-mass spectrometric quantification of insecticides in four different solvent extracts from ultrasonic and Soxhlet extraction

被引:17
作者
Schmeck, T [1 ]
Wenclawiak, B [1 ]
机构
[1] Univ Siegen, Dept Analyt Chem, D-57068 Siegen, Germany
关键词
gas chromatography-mass spectrometry; Soxhlet extraction; insecticides; sediments;
D O I
10.1365/s10337-005-0589-5
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
The performance of ultrasonic and Soxhlet extraction using hexane, dichloromethane, ethylacetate/methyl-tert-butylether (1/3, v/v) and hexane/acetone (1/1, v/v) for the analysis of seventeen insecticides in sediments was evaluated. The contents of the extracts differed severely. The extracts obtained with ethylacetate/methyl-tert-butylether (1/3, v/v) and hexane/acetone (1/1, v/v) were dark yellow to green, whereas the extracts obtained with dichloromethane and hexane were light yellow and clear respectively. This is due to higher solubility of matrix compounds in ethylacetate/methyl-tert-butylether (1/3, v/v) and hexone/acetone (1/1, v/v). High loads of coextracted matrix compounds lead to matrix effects in the evaporation step of GC-MS measurements. This is known as matrix induced response enhancement effect. Matrix effects and recoveries were checked by analysis of spiked sediments. The suitable choice of extraction method in connection with an appropriate solvent separates the analytes from matrix compounds. Matrix effects are reduced and recoveries of spiked samples are improved.
引用
收藏
页码:159 / 165
页数:7
相关论文
共 40 条
  • [1] ANATASSIADES M, 2003, J CHROMATOGR A, V1015, P163
  • [2] Barwick VJ, 1999, J SCI FOOD AGR, V79, P1190, DOI [10.1002/(SICI)1097-0010(19990701)79:9<1190::AID-JSFA348>3.3.CO
  • [3] 2-B, 10.1002/(SICI)1097-0010(19990701)79:9&lt
  • [4] 1190::AID-JSFA348&gt
  • [5] 3.0.CO
  • [6] 2-K]
  • [7] Matrix effects in the determination of acaricides and fungicides in must by gas chromatography with electron-capture and nitrogen-phosphorus detection
    Bernal, JL
    delNozal, MJ
    Jimenez, JJ
    Rivera, JM
    [J]. JOURNAL OF CHROMATOGRAPHY A, 1997, 778 (1-2) : 111 - 117
  • [8] Simplified multiresidue method for the determination of organophosphorus insecticides in olive oil
    Cabras, P
    Angioni, A
    Melis, M
    Minelli, EV
    Pirisi, FM
    [J]. JOURNAL OF CHROMATOGRAPHY A, 1997, 761 (1-2) : 327 - 331
  • [9] Correction function on biased results due to matrix effects -: Application to the routine analysis of pesticide residues
    Cuadros-Rodríguez, L
    García-Campaña, AM
    Almansa-López, E
    Egea-González, FJ
    Cano, MLC
    Frenich, AG
    Martínez-Vidal, JL
    [J]. ANALYTICA CHIMICA ACTA, 2003, 478 (02) : 281 - 301
  • [10] Dabrowski L, 2002, J SEP SCI, V25, P290, DOI 10.1002/1615-9314(20020401)25:5/6&lt