Determination of Heavy Metals in Raw Milk Produced in Tangshan City, China

Aijun Li,Jianmin Zhang,Biao Qi,Xin Zhou,Yi Zhang,Junli Meng,Baiqin Zheng,Xin Zhang,Xueliang Pang,Ruihuan Du,Aili Xiang,Ying Wu,Lixue Dong,N Qaddoumi,S.-K Koh,J Devlin

doi:10.1051/matecconf/20163903006

Aijun Li, Jianmin Zhang + Show 14 more

Open Access

https://doi.org/10.1051/matecconf/20163903006

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Abstract

The objective of this study was to investigate the content of heavy metals (Arsenic, Lead, Chromium and Mercury) in raw milk of Tangshan. Samples were obtained directly from dairy farms in Tangshan City. A total of 55 raw milk samples were collected in 2012, a total of 150 raw milk samples and 150 in 2013 and 2014 respectively. All the samples were analyzed by ICP-MS (Inductively Coupled Plasma Mass Spectrometry) method-based on China National Standard. In general, heavy metals (Arsenic, Lead, Chromium and Mercury) of raw milk in Tangshan were relatively safe for people’s health because none of those heavy metals (Arsenic, Lead, Chromium and Mercury) contents exceeded the Maximum Limit set by China.

Highlights

Raw milk is considered as an extremely nutritious food and rich in vitamin D, calcium, and protein, substances essential for construction of muscle, bone and other tissues[1, 2]
Can be seen from above (Table 1), none of Lead content exceeded the Maximum Limit set by China
None of Chromium content exceeded the Maximum Limit set by China

Summary

Introduction

Raw milk is considered as an extremely nutritious food and rich in vitamin D, calcium, and protein, substances essential for construction of muscle, bone and other tissues[1, 2]. Milk may contain lots of refractory substances, such as heavy metals(Arsenic, Lead, Chromium and Mercury), which can be potentially harmful to human health[2, 3]. Heavy metals tend to accumulate in the body, eventually to the extent of being toxic to humans[4, 5]. Arsenic causes skin disorders, which is subject to abnormal keratinization[6,7]. Arsenic may lead to skin pigmentation, nervous indigestion, progressively destroying metabolic system of body cells[8,9].The harmfulness of lead on children’s growth and intelligence behavior is especially serious. Lead may damage the kidney, liver and reproductive system, basic cellular processes and brain function. The children’s brain may stop developing[10, 11]

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