Authors:
C. Weers Research Centre 3. Westerduin Weg Petten (NH) The Netherlands

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D. Hoede Research Centre 3. Westerduin Weg Petten (NH) The Netherlands

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H. Das Research Centre 3. Westerduin Weg Petten (NH) The Netherlands

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Abstract  

The application of selective evaporation in an air-flow to the determination of arsenic and bromine in neutron-activated freeze-dried biological material is reported. Bromine is evaporated as Br2 during oxidative mineralisation. After addition of 48% HBr, arsenic is removed as AsBr3. The evaporated elements are collected in 7M NaOH;82Br (T=35.3 h) and76As (T=26.4 h) are used for quantitative assay. The chemical yield is (98±2)% for arsenic, irrespective of the amount of arsenic carrier. For bromine it varies from (70±10)% for carrier-free evaporation to (98±2)% if sufficient carrier is added. This addition is not permitted if arsenic has to be determined. The limits of determination are 5 ng·g−1 and 2 ng·g−1 respectively. The precision is ≤10% for both elements. The procedure is performed in a standardised apparatus. It was applied to the analysis of standard kale, orchard leaves and animal blood. Bromine was determined instrumentally for purpose of comparison.

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation
1968
Volumes
per Year
1
Issues
per Year
12
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)