Quantitative Analysis of Pork and Chicken Products by Droplet Digital PCR

In this project, a highly precise quantitative method based on the digital polymerase chain reaction (dPCR) technique was developed to determine the weight of pork and chicken in meat products. Real-time quantitative polymerase chain reaction (qPCR) is currently used for quantitative molecular analy...

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Bibliographic Details
Published in:BioMed research international 2014-01, Vol.2014 (2014), p.1-6
Main Authors: Pan, Liangwen, Li, Jian, Yang, Jielin, Lv, Rong, Li, Xiang, Cai, Yicun, He, Yuping
Format: Article
Language:English
Subjects:
Accuracy
Animals
Biomedical research
Chemistry, Analytic
Chickens
Deoxyribonucleic acid
DNA
DNA - analysis
DNA - chemistry
Experiments
Food
Gene expression
Genetic testing
Linear Models
Meat - analysis
Meat - classification
Meat inspection
Meat Products
Meat quality
Methods
Phenols
Polymerase chain reaction
Quantitative
Real-Time Polymerase Chain Reaction - methods
Sensitivity and Specificity
Species Specificity
Swine
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Summary:In this project, a highly precise quantitative method based on the digital polymerase chain reaction (dPCR) technique was developed to determine the weight of pork and chicken in meat products. Real-time quantitative polymerase chain reaction (qPCR) is currently used for quantitative molecular analysis of the presence of species-specific DNAs in meat products. However, it is limited in amplification efficiency and relies on standard curves based Ct values, detecting and quantifying low copy number target DNA, as in some complex mixture meat products. By using the dPCR method, we find the relationships between the raw meat weight and DNA weight and between the DNA weight and DNA copy number were both close to linear. This enabled us to establish formulae to calculate the raw meat weight based on the DNA copy number. The accuracy and applicability of this method were tested and verified using samples of pork and chicken powder mixed in known proportions. Quantitative analysis indicated that dPCR is highly precise in quantifying pork and chicken in meat products and therefore has the potential to be used in routine analysis by government regulators and quality control departments of commercial food and feed enterprises.
ISSN:2314-6133
2314-6141
DOI:10.1155/2014/810209