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Determination of Polycyclic Aromatic Hydrocarbons in Italian Milk by HPLC With Fluorescence Detection

Determination of Polycyclic Aromatic Hydrocarbons in Italian Milk by HPLC With Fluorescence Detection

A M Girelli, D Sperati, A M Tarola

Food Addit Contam Part A Chem Anal Control Expo Risk Assess. 2014 Apr;31(4):703-10.

PMID: 24417240

Abstract:

The presence of polycyclic aromatic hydrocarbons (PAHs) in Italian commercial milk samples is reported. The study was carried out on lactating (cow and goat) and plant (rice, soya, oat) milk. The quantitative determination involved liquid-liquid extraction of PAHs, a pre-concentration and determination by HPLC using a fluorescence detector. The recovery of analytes was in the range of 70-115%. The precision of the method was found to be between 6% and 24%. The detection limit ranged from 0.66 to 33.3 µg l(-1) corresponding to 0.03-1.66 µg kg(-1) milk (wet weight), at a signal-to-noise ratio of 3, depending on the compound. By this procedure, the levels of more volatile PAHs (two to three aromatic rings) were confirmed in 34 commercial milk and three plant milk samples, whereas benzo[a]pyrene was found only in five pasteurised milk samples at a mean concentration of 0.17 µg kg(-1) milk. These results provide evidence that PAH levels are influenced by heat treatments and skimming processes of milk production.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AS26686	PAHs by HPLC			Price

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