Comparison of three digestion methods for determination of lead and cadmium in milk and dairy products
Background: Toxic metals enter the human food chain through water, soil, and plants. High consumption of dairy products makes it necessary to measure their concentrations in milk and its products. Methods: In this study, four samples of dairy products, including milk, dough, yogurt, and cream wer...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Kerman University of Medical Sciences
2023-03-01
|
| Series: | Environmental Health Engineering and Management |
| Subjects: | |
| Online Access: | http://ehemj.com/browse.php?a_id=1095&sid=1&slc_lang=en&ftxt=1 |
| _version_ | 1797798525962027008 |
|---|---|
| author | Mohammad Reza Mehrasebi Mazyar Peyda Rezgar Feizolahi Azra Taromi Pegah Homayuni Sara Fathi Zohre Farahmandkia |
| author_facet | Mohammad Reza Mehrasebi Mazyar Peyda Rezgar Feizolahi Azra Taromi Pegah Homayuni Sara Fathi Zohre Farahmandkia |
| author_sort | Mohammad Reza Mehrasebi |
| collection | DOAJ |
| description | Background: Toxic metals enter the human food chain through water, soil, and plants. High
consumption of dairy products makes it necessary to measure their concentrations in milk and its
products.
Methods: In this study, four samples of dairy products, including milk, dough, yogurt, and cream were
selected. They were spiked with concentrations of 0, 20, 40, and 60 μg/kg of lead (Pb) and cadmium
(Cd) separately. In all samples, the concentration of these metals was determined using graphite furnace
atomic absorption spectroscopy (GFAAS) after microwave, wet, and dry ashing digestion methods. To
select the best digestion method, recovery percentage, linearity of increasing concentrations, relative
standard deviation (RSD), and the limit of detection were used.
Results: According to the results, the RSD of all measurements was less than 5%. The instrument
detection limit for Pb and Cd were 0.188 and 0.157 μg/L, respectively. The recovery efficiency of all
digested samples by three methods was between 75.7% and 120%. According to the linearity index and
R2, the microwave digestion method with 90 to 110% efficiency was the best for Pb-spiked samples, and
the dry digestion method was the best for Cd-spiked samples.
Conclusion: Considering all indexes, microwave digestion was the best method for Pb and Cd samples. |
| first_indexed | 2024-03-13T04:05:03Z |
| format | Article |
| id | doaj.art-3a6eb866e37f4a03a004de794890bc50 |
| institution | Directory Open Access Journal |
| issn | 2423-3765 2423-4311 |
| language | English |
| last_indexed | 2024-03-13T04:05:03Z |
| publishDate | 2023-03-01 |
| publisher | Kerman University of Medical Sciences |
| record_format | Article |
| series | Environmental Health Engineering and Management |
| spelling | doaj.art-3a6eb866e37f4a03a004de794890bc502023-06-21T07:48:09ZengKerman University of Medical SciencesEnvironmental Health Engineering and Management2423-37652423-43112023-03-0110219119610.34172/EHEM.2023.21Comparison of three digestion methods for determination of lead and cadmium in milk and dairy productsMohammad Reza Mehrasebi0Mazyar Peyda1Rezgar Feizolahi2Azra Taromi 3Pegah Homayuni4Sara Fathi5Zohre Farahmandkia6Department of Environmental Health, School of Public Health, Zanjan University of Medical Sciences, Zanjan, IranDepartment of Environmental Health, School of Public Health, Zanjan University of Medical Sciences, Zanjan, IranDepartment of Environmental Health, School of Public Health, Zanjan University of Medical Sciences, Zanjan, IranDepartment of Environmental Health, School of Public Health, Zanjan University of Medical Sciences, Zanjan, IranDepartment of Environmental Health, School of Public Health, Zanjan University of Medical Sciences, Zanjan, IranDepartment of Environmental Health, School of Public Health, Zanjan University of Medical Sciences, Zanjan, IranDepartment of Environmental Health, School of Public Health, Zanjan University of Medical Sciences, Zanjan, IranBackground: Toxic metals enter the human food chain through water, soil, and plants. High consumption of dairy products makes it necessary to measure their concentrations in milk and its products. Methods: In this study, four samples of dairy products, including milk, dough, yogurt, and cream were selected. They were spiked with concentrations of 0, 20, 40, and 60 μg/kg of lead (Pb) and cadmium (Cd) separately. In all samples, the concentration of these metals was determined using graphite furnace atomic absorption spectroscopy (GFAAS) after microwave, wet, and dry ashing digestion methods. To select the best digestion method, recovery percentage, linearity of increasing concentrations, relative standard deviation (RSD), and the limit of detection were used. Results: According to the results, the RSD of all measurements was less than 5%. The instrument detection limit for Pb and Cd were 0.188 and 0.157 μg/L, respectively. The recovery efficiency of all digested samples by three methods was between 75.7% and 120%. According to the linearity index and R2, the microwave digestion method with 90 to 110% efficiency was the best for Pb-spiked samples, and the dry digestion method was the best for Cd-spiked samples. Conclusion: Considering all indexes, microwave digestion was the best method for Pb and Cd samples.http://ehemj.com/browse.php?a_id=1095&sid=1&slc_lang=en&ftxt=1milkcadmiumleaddigestionspectrophotometry |
| spellingShingle | Mohammad Reza Mehrasebi Mazyar Peyda Rezgar Feizolahi Azra Taromi Pegah Homayuni Sara Fathi Zohre Farahmandkia Comparison of three digestion methods for determination of lead and cadmium in milk and dairy products Environmental Health Engineering and Management milk cadmium lead digestion spectrophotometry |
| title | Comparison of three digestion methods for determination of lead and cadmium in milk and dairy products |
| title_full | Comparison of three digestion methods for determination of lead and cadmium in milk and dairy products |
| title_fullStr | Comparison of three digestion methods for determination of lead and cadmium in milk and dairy products |
| title_full_unstemmed | Comparison of three digestion methods for determination of lead and cadmium in milk and dairy products |
| title_short | Comparison of three digestion methods for determination of lead and cadmium in milk and dairy products |
| title_sort | comparison of three digestion methods for determination of lead and cadmium in milk and dairy products |
| topic | milk cadmium lead digestion spectrophotometry |
| url | http://ehemj.com/browse.php?a_id=1095&sid=1&slc_lang=en&ftxt=1 |
| work_keys_str_mv | AT mohammadrezamehrasebi comparisonofthreedigestionmethodsfordeterminationofleadandcadmiuminmilkanddairyproducts AT mazyarpeyda comparisonofthreedigestionmethodsfordeterminationofleadandcadmiuminmilkanddairyproducts AT rezgarfeizolahi comparisonofthreedigestionmethodsfordeterminationofleadandcadmiuminmilkanddairyproducts AT azrataromi comparisonofthreedigestionmethodsfordeterminationofleadandcadmiuminmilkanddairyproducts AT pegahhomayuni comparisonofthreedigestionmethodsfordeterminationofleadandcadmiuminmilkanddairyproducts AT sarafathi comparisonofthreedigestionmethodsfordeterminationofleadandcadmiuminmilkanddairyproducts AT zohrefarahmandkia comparisonofthreedigestionmethodsfordeterminationofleadandcadmiuminmilkanddairyproducts |