scholarly journals Voltammetric Study of the Interaction between Melamine and DNA on a Carboxylic Acid-Functionalized Nano-Fe<sub>3</sub>O<sub>4</sub> Modified Electrode and Its Analytical Application for Melamine Determination in Liquid Milk Samples

2015 ◽  
Vol 06 (04) ◽  
pp. 263-273 ◽  
Author(s):  
Ke Chen ◽  
Haoyu Shen ◽  
Zhejun Wang ◽  
Amen Zhou ◽  
Qinghua Xia
Keyword(s):  
Carboxylic Acid ◽  
Modified Electrode ◽  
Analytical Application ◽  
Milk Samples ◽  
Voltammetric Study ◽  
Liquid Milk

Voltammetric study on the interaction of heparin with toluidine blue, and its analytical application

2006 ◽  
Vol 156 (3-4) ◽  
pp. 297-302 ◽  
Author(s):  
Xiu Ying Peng ◽  
Hong Qun Luo ◽  
Nian Bing Li
Keyword(s):  
Toluidine Blue ◽  
Analytical Application ◽  
Voltammetric Study

A Survey of 61 Veterinary Drug Residues in Commercial Liquid Milk Products in China

2020 ◽  
Vol 83 (7) ◽  
pp. 1227-1233
Author(s):  
RUNJIA SHI ◽  
ZHONGNA YU ◽  
WEI WU ◽  
HARVEY HO ◽  
JUN WANG ◽  
...  
Keyword(s):  
Veterinary Drug ◽  
Veterinary Drug Residues ◽  
Drug Residues ◽  
Milk Products ◽  
Pasteurized Milk ◽  
Drug Residue ◽  
Milk Samples ◽  
Group I ◽  
Liquid Milk ◽  
Ultrahigh Temperature

ABSTRACT To investigate the drug residue status in commercial liquid milk products in China, 190 samples, including ultrahigh temperature milk (n = 168) and pasteurized milk (n = 22) samples, were collected in 2019. Milk samples were analyzed for the presence of any of the 61 veterinary drugs in them by using a screening assay combined with an ultraperformance liquid chromatography–tandem mass spectrometry analysis. Ten (5.26%) samples were found positive for β-lactams, tetracyclines, and aminoglycosides, and six (3.16%) samples were confirmed residual for penicillin G (n = 6; 3.16%), tetracycline (n = 1; 0.53%), and oxytetracycline (n = 1; 0.53%), with the maximum concentration of 2.85, 40.64, and 12.35 μg kg−1, respectively. Drug residue detection rate in group II (4.55%; the local city domestic brands) was higher than that in group I (2.70%; the major brands of China) and group III (2.78%; the imported brands into China) and higher in domestic samples (3.39%) than that in imported samples (2.78%), and higher in pasteurized milk samples (9.09%) than in ultrahigh temperature milk samples (2.38%). All drug residue levels were far below the regulated maximum residue limits. However, based on some veterinary drug residues detected in the samples, there is a potential veterinary drug risk in liquid milk products in the Chinese market, and this situation deserves the attention of governments and consumers. HIGHLIGHTS

A Survey of Aflatoxin M1 in Commercial Liquid Milk Products in China

2020 ◽  
Author(s):  
Runjia Shi ◽  
Zhongna Yu ◽  
Harvey Ho ◽  
Wei Wu ◽  
Jun Wang ◽  
...  
Keyword(s):  
Detection Rate ◽  
Rapid Test ◽  
The United States ◽  
Aflatoxin M1 ◽  
Chinese Government ◽  
Milk Products ◽  
Milk Samples ◽  
Group I ◽  
Test Kit ◽  
Liquid Milk

The objective of this study was to investigate the occurrence of aflatoxin M1 (AFM1) in Chinese liquid milk products. A total of 190 liquid milk samples, including 168 ultra-high temperature treated (UHT) milk samples and 22 pasteurized milk (PM) samples were collected in August 2019. A screening assay with the Charm Rapid Test Kit and a confirmation method with high-performance liquid chromatography (HPLC) were used for AFM1 analysis. Nine (4.74%) samples were screened positive, of which 5 (2.11%) samples were confirmed with concentration levels of 0.022-0.049μg/kg. The AFM1 levels confirmed were all below the maximum residue levels (MRLs) set by China, the European Union (EU), the United States of America (USA), and the Codex Alimentarius Commission (CAC). The detection rate of AFM1 in domestic milk samples was 3.39%, while no AFM1 was detected in samples of imported milk. The prevalence of AFM1 detected in three groups were: Group I (2.70%, the major brands of China ), Group II (4.55%, the local city domestic brands) and Group III (0, the imported brands into China). The detection rate of AFM1 in PM samples (9.09%) was significantly higher than UHT samples (1.19%) ( P &lt; 0.05). Although the residue level of AFM1 in none of the samples exceeded the MRLs, the higher detection rate in local Chinese brands, especially in PM samples, deserves the attention of the Chinese government and consumers.

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