Investigating the level of contamination of traditional and industrial Doogh (Persian yogurt drink) in Shahrekord market with four heavy metals
مریم Abbasvali
1
(
Assistant Professor, Department of Food Hygiene and Quality Control, School of Veterinary Medicine, Shahrekord University, Shahrekord, Iran
)
Hadiseh Baharlou
2
(
Shahrekord university
)
مجتبی Boniadian
3
(
- Associated Professor of Food Hygiene, Shahrekord University, Shahrekord, Iran
)
Keywords: Doogh, , Shahrekord, , Heavy metals, Inductively coupled plasma optical emission spectrometry,
Abstract :
The purpose of this study was to quantify the level of contamination of traditional and industrial Doogh consumed in Shahrekord with arsenic, cadmium, lead, and mercury. Inductively coupled plasma optical emission spectrometry (ICP-OES) was used to measure the concentration of the aforementioned metals in 80 Doogh samples (40 industrial and 40 traditional samples), purchased from Shahrekord stores. Arsenic levels in the samples were below the device's detection limit, but two samples were contaminated—one with 400.63 ppb of cadmium and one with 144.72 ppb of lead, both of which were above the allowable limit. The permissible limit for mercury contamination (10 ppb) was exceeded in 25% of the samples. Industrial Doogh was more contaminated (30%) than traditional Doogh (20%) in terms of mercury content, but there was no difference between the two (P = 0.44). The used milk, salt, and water could be the source of the heavy metals in Doogh. Differences in the type of feed provided to animals during cold and warm seasons, the type of animals feeding in traditional and industrial livestock properties, different stages of production and processing, environmental pollution in various geographic locations, and the degree of contamination of drinking water in animal husbandry facilities can all contribute to variations in the concentration of elements in milk.
