US EPA

1348728 

Journal Article 

ARSENIC IN DUTCH MILK POWDER - DETERMINATION BY ATOMIC-ABSORPTION SPECTROSCOPY AFTER COLD TRAPPING OF THE GENERATED HYDRIDE 

Koops, J; Westerbeek, D; Degraaf, C 

1989 

1 

Netherlands Milk and Dairy Journal
ISSN: 0028-209X 

BIOSIS/90/16698 

43 

4 

477-493 

eng 

WOS:A1989CU78100005 

BIOSIS COPYRIGHT: BIOL ABS. In this paper results are given of the determination of arsenic (As) in milk powder and in liquid milk for retail sale, by hydride AAS after preconcentration of the generated hydride. Pelletized samples of milk powder or of freeze-dried milk are combusted with oxygen in a small ashing chamber of quartz (Trace-O-Mat). The volatile As is condensed on a 'cold finger' cooled with liquid nitrogen, and subsequently stripped by refluxing with a small volume of ultrapure hydrochloric acid. As (V) is reduced by borohydride, the arsine is trapped at liquid nitrogen temperature, released by heating, and swept, with He and H2 as carrier gasses, into the measuring cell. Milk was found to contain approximately 0.3 mug As.kg-1. The values obtained were far below the (suggested) allowable amount for milk (100 mug.kg-1). 

Biochemical Methods-General; Biochemical Studies-General; Biophysics-General Biophysical Techniques; Food Technology-Dairy Products; Food Technology-Evaluations of Physical and Chemical Properties (1970- ); Toxicology-Foods