Comparison of three digestion methods for determination of lead and cadmium in milk and dairy products
Journal Title: Environmental Health Engineering and Management Journal - Year 2023, Vol 10, Issue 2
Abstract
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.
Authors and Affiliations
Mohammad Reza Mehrasebi , Mazyar Peyda, Rezgar Feizolahi , Azra Taromi, Pegah Homayuni, Sara Fathi, Zohre Farahmandkia
Keywords
Related Articles
- EP ID EP718085
- DOI 10.34172/EHEM.2023.21
- Views 35
- Downloads 0
Modeling the concentration of suspended particles by fuzzy inference system (FIS) and adaptive neuro-fuzzy inference system (ANFIS) techniques: A case study in the metro stations
Background: Today, the usage of artificial intelligence systems and computational intelligence is increasing. This study aimed to determine the fuzzy system algorithms to model and predict the amount of air pollution b...
Feasibility study of the application of treated wastewater for the irrigation of forest species in a Saharan area
Background: After suffering from an acute problem of excess water for a long time, the Oasis of Ouargla benefited from an aerated lagoon treatment plant, producing biologically treated domestic effluents. The aim of th...
Comparing the performance of UV/Acetylacetone and UV/O3 processes for treatment of olive mill wastewater
Background: Olive mill wastewater (OMW) is characterized by its high organic content and refractory compounds. The aim of this study was to evaluate and compare the efficiency of UV/O3 and UV/ acetylacetone (UV/AcAc) pro...
Antibiotic resistance: A link from local bio-pollution cycle to global dissemination
This article has no abstract.
Membrane fouling mechanism of submerged membrane bioreactor during erythromycin removal
Background: Based on the previous studies, antibiotics can have affected biological properties of biomass and fouling properties of mixed liquor in aeration tank. The present study was conducted to explore the fouling...