DETERMINATION OF ORGANOCHLORINE PESTICIDE CONTENT IN HUMAN-MILK AND INFANT FORMULAS USING SOLID-PHASE EXTRACTION AND CAPILLARY GAS-CHROMATOGRAPHY

The differences in the organochlorine pesticide contents of human milk and infant formulas are examined. Twenty-six organochlorine pesticide s were routinely extracted from milk by means of a solid phase system into n-hexane. An aliquot of n-hexane was injected into a GC equipped with an electron capture or mass spectrometry detector. Advantages of this method include high sensitivity, analysis time of 45 min after a single extraction, and high recovery. Fifteen human milk samples and 4 5 infant formula samples, which cover the whole range of products offe red in the market (starting formula, follow-up formula, adapted formul a, and specialized formulas developed for premature or low birth weigh t infants, infants intolerant to milk proteins or lactose, infants wit h fat absorption problems, and infants with inborn errors of metabolis m). The organochlorine pesticide content found in human milk was highe r than in infant formulas.