Microwave-assisted extraction coupled with gas chromatography electron capture negative chemical ionization mass spectrometry for the simplified determination of imidazolinone herbicides in soil at the ppb level

被引:69
作者
Stout, SJ
daCunha, AR
Allardice, DG
机构
[1] American Cyanamid Company, Agric. Products Research Division, Princeton, NJ 08543-0400
关键词
D O I
10.1021/ac950930e
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
The imidazolinones are a significant new class of low-use-rate, reduced-environmentaI-risk herbicides for protection of a wide variety of agricultural commodities, Because of their low rates of application, residues of the imidazolinones in soil need to be monitored at the low ppb level, Current methodology for this purpose involves an exhaustive base extraction followed by a laborious, time-consuming cleanup procedure to permit analysis at the 5 ppb level. Using imazethapyr, the most widely utilized member of the class, as a representative, we have achieved not only a limit of quantitation of 1 ppb but also a greatly simplified cleanup procedure by combining microwave-assisted extraction technology with gas chromatography/electron electron capture negative chemical ionization mass spectrometry, On a variety of soil types covering a fortification range of 1-50 ppb, an average recovery of 92% with a standard deviation of 13% was achieved. Control soil extracts gave apparent residues of <0.2 ppb, Sample preparation time per sample was reduced from 2 h to 10 min.
引用
收藏
页码:653 / 658
页数:6
相关论文
共 24 条
  • [1] EVIDENCE FOR THE INTERACTION OF AN IMIDAZOLINONE HERBICIDE WITH LEUCINE, VALINE, AND ISOLEUCINE METABOLISM
    ANDERSON, PC
    HIBBERD, KA
    [J]. WEED SCIENCE, 1985, 33 (04) : 479 - 483
  • [2] EFFECTS OF TILLAGE AND APPLICATION METHOD ON CLOMAZONE, IMAZAQUIN, AND IMAZETHAPYR PERSISTENCE
    CURRAN, WS
    LIEBL, RA
    SIMMONS, FW
    [J]. WEED SCIENCE, 1992, 40 (03) : 482 - 489
  • [3] DEVINE JM, 1991, IMIDAZOLINONE HERBIC, pCH13
  • [4] DOUGHERTY RC, 1981, ANAL CHEM, V53, pA625
  • [5] EFFECTIVE SAMPLE PREPARATION METHOD FOR EXTRACTING BIOLOGICALLY-ACTIVE COMPOUNDS FROM DIFFERENT MATRICES BY A MICROWAVE TECHNIQUE
    GANZLER, K
    SZINAI, I
    SALGO, A
    [J]. JOURNAL OF CHROMATOGRAPHY, 1990, 520 : 257 - 262
  • [6] MICROWAVE EXTRACTION - A NOVEL SAMPLE PREPARATION METHOD FOR CHROMATOGRAPHY
    GANZLER, K
    SALGO, A
    VALKO, K
    [J]. JOURNAL OF CHROMATOGRAPHY, 1986, 371 : 299 - 306
  • [7] ANALYTICAL-SCALE SUPERCRITICAL FLUID EXTRACTION
    HAWTHORNE, SB
    [J]. ANALYTICAL CHEMISTRY, 1990, 62 (11) : A633 - &
  • [8] SUPERCRITICAL FLUID EXTRACTION OF POLAR ANALYTES USING INSITU CHEMICAL DERIVATIZATION
    HAWTHORNE, SB
    MILLER, DJ
    NIVENS, DE
    WHITE, DC
    [J]. ANALYTICAL CHEMISTRY, 1992, 64 (04) : 405 - 412
  • [9] PULSED POSITIVE NEGATIVE-ION CHEMICAL IONIZATION MASS-SPECTROMETRY
    HUNT, DF
    STAFFORD, GC
    CROW, FW
    RUSSELL, JW
    [J]. ANALYTICAL CHEMISTRY, 1976, 48 (14) : 2098 - 2105
  • [10] ROLE OF MODIFIERS FOR ANALYTICAL-SCALE SUPERCRITICAL-FLUID EXTRACTION OF ENVIRONMENTAL-SAMPLES
    LANGENFELD, JJ
    HAWTHORNE, SB
    MILLER, DJ
    PAWLISZYN, J
    [J]. ANALYTICAL CHEMISTRY, 1994, 66 (06) : 909 - 916