TY  - SER
AU  - Meiring,H.D.
AU  - den Engelsman,G.
AU  - de Jong,A.P.J.M.
TI  - Determination of polar pesticides by phasetransfer catalysed derivatization and negative-ion chemical ionization gas chromatography-mass spectrometry
KW  - PESTICIDES
KW  - IF
ISSN  - 0021-9673
Sources  - Journal of Chromatography
Sources  - 644 (2) 1993 : 357-365
ER  -