2024-03-28T13:22:05Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1159302018-09-14T07:35:51Zcom_10261_42343com_10261_2col_10261_42344
Manganese and zinc analysis in milk by microwave oven digestion and platform graphite furnace atomic absorption spectrometry
Fuente, Miguel Ángel de la
Guerrero, Gonzalo
Juárez, Manuela
Zinc
Manganese
Microwave digestion
Graphite furnace atomic absorption spectrometry
Milk
A conventional microwave oven acid digestion system employing PTFE reactors was tested for sample digestion prior to the analysis of Mn and Zn in milk. The digestion procedure was based on sample dissolution with nitric acid using microwave heating in closed vessels. Sample treatment time in the microwave oven was reduced to 15 min. The resulting solutions, analyzed for Zn by flame atomic absorption spectrometry (FAAS) and by platform graphite furnace atomic absorption spectrometry with Zeeman background correction for Zn and Mn, showed good agreement with the certified milk values (SRM-1549 nonfat milk powder, National Institute of Standards and Technology), and results were comparable to those obtained by dry mineralization in real samples. The precision of the method was about 6% for Mn and 5% for Zn by graphite furnace atomic absorption spectrometry (GFAAS) with limits of detection of 0.07 and 0.28 μg L-1, respectively. The digestion procedure can be used to determine Zn by FAAS and Mn by GFAAS in milk analysis. Using GFAAS, Zn can also be measured in milk fractions where it is found in smaller concentrations. © 1995 American Chemical Society.
@ Funds to carry out this work were provided by the Comisión Interministerial de Ciencia y Tecnologia (Research Project ALI93-0005-CP)
Peer Reviewed
2015-06-01T06:48:59Z
2015-06-01T06:48:59Z
1995
2015-06-01T06:49:00Z
artículo
http://purl.org/coar/resource_type/c_6501
doi: 10.1021/jf00057a017
issn: 0021-8561
Journal of Agricultural and Food Chemistry 43: 2406- 2410 (1995)
http://hdl.handle.net/10261/115930
10.1021/jf00057a017
none
American Chemical Society