RT null
T1 Determination of Methylmercury in Selected Marine Organisms by Gas Chromatography
K1 mercury
K1 gas
K1 marine environment
K1 marine biology
K1 marine ecosystem
K1 marine pollution
K1 chemical
K1 pollutant
K1 toxic substance
PB United Nations Environment Programme
SN Not Available
YR 1984
FD 1984
LK https://wedocs.unep.org/handle/20.500.11822/31505
UL https://wedocs.unep.org/handle/20.500.11822/31505
NO This reference method describes a gas chromatographic procedure for determining methylmercury in selected marine biological organisms. It covers the analytical process from sampling and sample preparation through dry-weight determination, extraction, clean-up, gas chromatographic analysis, calculation of results, precision and accuracy assessment, quality control, and reporting. The method uses acid liberation of methylmercury from homogenised biological material, extraction into benzene, separation from interfering substances using cysteine, and subsequent gas chromatographic measurement. It specifies required reagents, apparatus, preparation of standards, operating conditions, calibration procedures, quality control checks, and reporting requirements. The document also provides a test-report form for recording analytical conditions, results, precision, accuracy, and other relevant information.
DS UN Environment Document Repository
RD Sep 20, 2026