A smartphone-based diagnostic analyzer for point-of-care milk somatic cell counting

Sun, Xiaoyun; Zhao, Ruiming; Wang, Xianhua; Wu, Yunlong; Yang, Degang; Wang, Jianhui; Wu, Zhihong; Wang, Nan; Zhang, Juan; Xiao, Bin; Chen, Jiaci; Huang, Fengchun; Chen, Ailiang

doi:10.1016/j.aca.2024.342540

Analytica Chimica Acta

2024

DOI: 10.1016/j.aca.2024.342540

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A smartphone-based diagnostic analyzer for point-of-care milk somatic cell counting

Xiaoyun Sun,

Ruiming Zhao,

Xianhua Wang

et al.

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The Accurate and Exclusive Quantification of Somatic Cells in Raw Milk with an OPD-Cu2+ System-Based Colorimetric Method

Xie,

Wang,

Liu

et al. 2024

Foods

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The somatic cell count (SCC) refers to the number of somatic cells present in each milliliter of raw milk and serves as a crucial indicator of dairy cow udder health and raw milk quality. Traditional SCC detection methods are often time-consuming, expensive, and susceptible to bacterial interference, rendering them unsuitable for the rapid and unbiased assessment of raw milk quality. Consequently, there is an urgent need for a low-cost, accurate, and user-friendly SCC quantification method. Here, a method based on an OPD-Cu2+ system for SCC quantification was developed. It was found that OPD oxidation signals exhibited a linear correlation with SCC. Following optimization, the detection system was established with a Cu2+ concentration of 25 μM, an OPD concentration of 2 mM, and an incubation time of 15 min. Furthermore, the method demonstrated significant resistance to bacterial interference, though it produced weaker signals in response to bacteria. The somatic cell recovery rate in milk after pretreatment was 88.9%, and SCC was quantified accurately within 45 min, with a linear range of 104–106 cells/mL. In summary, the method developed is cost-effective, straightforward, and facilitates precise somatic cell quantification, offering significant practical value and a new approach for SCC detection in raw milk.

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The Accurate and Exclusive Quantification of Somatic Cells in Raw Milk with an OPD-Cu2+ System-Based Colorimetric Method

Xie,

Wang,

Liu

et al. 2024

Foods

View full text Add to dashboard Cite

show abstract

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A smartphone-based diagnostic analyzer for point-of-care milk somatic cell counting

Cited by 1 publication

References 40 publications

The Accurate and Exclusive Quantification of Somatic Cells in Raw Milk with an OPD-Cu2+ System-Based Colorimetric Method

The Accurate and Exclusive Quantification of Somatic Cells in Raw Milk with an OPD-Cu2+ System-Based Colorimetric Method

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