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Wang H, Jiang Y, Tian C, Pan R, Dang F, Feng J, Li M, Zhang Y, Li H, Man C. Determination of the transfer of lead and chromium from feed to raw milk in Holstein cows. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2018; 35:1990-1999. [PMID: 30183547 DOI: 10.1080/19440049.2018.1496279] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
In this study, we aimed to determinate the transfer of lead (Pb) and chromium (Cr) from feed to raw milk in Holstein cows. Solutions of lead acetate and chromium (III) nicotinate were added together at different levels to individual portions of feed on a daily basis. Lead administration for the low-, middle- and high-dosage groups was controlled as 0.9, 1.8 and 3.6 g/day for 30, 30 and 25 days, while chromium was feed at 0.47, 1.5 and 4.7 g/d for 40, 40, and 40 days, respectively. A sensitive graphite furnace atomic absorption spectrometry (GFAAS) method was developed and optimised with a respective limit of detection of lead and chromium found to be 1 and 5 μg kg-1 raw milk. The optical wavelengths for detection of lead and chromium were 283.31 nm and 357.87 nm respectively. The results showed that the highest concentrations of lead in raw milk for the low-, middle- and high-dosage groups were 0.083 ± 0.021, 0.215 ± 0.064 and 0.232 ± 0.035 mg kg-1, which displayed a positive correlation with dosage levels. In addition, a high dosage level accompanied a greater rate of loss of lead contents after dosing withdrawal. However, chromium concentrations maintained a relatively stable range around 0.1 mg kg-1 raw milk for all dosing groups and showed little transfer from feed to raw milk through the whole experiment.
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Affiliation(s)
- Hui Wang
- a Key Laboratory of Dairy Science, Ministry of Education , College of Food Science and Engineering, Northeast Agricultural University , Harbin , China
| | - Yujun Jiang
- a Key Laboratory of Dairy Science, Ministry of Education , College of Food Science and Engineering, Northeast Agricultural University , Harbin , China.,b National Research Center of Dairy Engineering and Technology , Northeast Agricultural University , Harbin , China
| | - Chengxin Tian
- a Key Laboratory of Dairy Science, Ministry of Education , College of Food Science and Engineering, Northeast Agricultural University , Harbin , China
| | - Ruili Pan
- a Key Laboratory of Dairy Science, Ministry of Education , College of Food Science and Engineering, Northeast Agricultural University , Harbin , China
| | - Fangfang Dang
- a Key Laboratory of Dairy Science, Ministry of Education , College of Food Science and Engineering, Northeast Agricultural University , Harbin , China
| | - Jing Feng
- a Key Laboratory of Dairy Science, Ministry of Education , College of Food Science and Engineering, Northeast Agricultural University , Harbin , China
| | - Mingyu Li
- a Key Laboratory of Dairy Science, Ministry of Education , College of Food Science and Engineering, Northeast Agricultural University , Harbin , China
| | - Yashuo Zhang
- a Key Laboratory of Dairy Science, Ministry of Education , College of Food Science and Engineering, Northeast Agricultural University , Harbin , China
| | - Hongfu Li
- a Key Laboratory of Dairy Science, Ministry of Education , College of Food Science and Engineering, Northeast Agricultural University , Harbin , China
| | - Chaoxin Man
- a Key Laboratory of Dairy Science, Ministry of Education , College of Food Science and Engineering, Northeast Agricultural University , Harbin , China
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