Rapid freshness evaluation of cow milk at different storage temperatures using in situ electrical conductivity measurement

Hwang, Jin Ho; Jung, Ah Hyun; Yu, Seung Su; Park, Sung Hee

doi:10.1016/j.ifset.2022.103113

Cited by 12 publications

(5 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Based on these results, it is evident that the volatiles produced by shrimps A and B were significantly less compared to shrimp C. This reinforces the pivotal role of storage temperature in preserving the freshness of food samples. [41][42][43] Figure 4d provides insights into the rate of shrimp deterioration at varying storage temperatures. Notably, the frequency shift of the PVAc11 sensor when exposed to shrimp C was markedly more pronounced than its response to shrimps A and B, which were stored at À 18 °C and À 4 °C, respectively.…”

Section: Resultsmentioning

confidence: 99%

Early Spoilage Detection of Cultured Pacific White Shrimp Using Quartz Crystal Microbalance Gas Sensors

Rianjanu,

Rayhan,

Aulya

et al. 2024

ChemistrySelect

View full text Add to dashboard Cite

In this study, quartz crystal microbalance (QCM) gas sensors, coated with electrospun polyvinyl acetate (PVAc) nanofibers, were employed to monitor the spoilage level of cultured Pacific white shrimp. The sensors exhibited a sensitivity range of 0.63 to 1.61 Hz/ppm when detecting trimethylamine vapor, a key biomarker for shrimp spoilage. Significant resonance frequency shifts were observed in the as‐prepared sensors when exposed to amine gases released by long‐stored shrimps. These shifts underline the significance of low‐temperature storage for shrimps. While color changes in the shrimps stored at ambient temperature (25 °C) become noticeable to the naked eye after 6 hours, the sensor detects sample deterioration much earlier, registering a prominent frequency shift (178 Hz) within only 3 hours of storage. This outcome suggests the potential of nanofiber‐coated QCM sensors as early‐stage food freshness indicators.

show abstract

Section: Resultsmentioning

confidence: 99%

Early Spoilage Detection of Cultured Pacific White Shrimp Using Quartz Crystal Microbalance Gas Sensors

Rianjanu,

Rayhan,

Aulya

et al. 2024

ChemistrySelect

View full text Add to dashboard Cite

show abstract

“…[4][5][6] Furthermore, the assessment of electrical conductivity in food samples contributes to effective quality evaluation, enhancing overall food safety. [7][8][9] Real-time monitoring of essential parameters such as soil salinity and moisture content facilitates informed decision-making for crop selection and irrigation methods tailored to specic soil conditions. 10,11 As the agricultural landscape undergoes transformation with the advent of smart farming, there is a heightened demand for obtaining nutrient data related to crop cultivation.…”

Section: Introductionmentioning

confidence: 99%

PCB-C⁴D coupled with paper-based microfluidic sampling for the rapid detection of liquid conductivity

Yang,

Cao,

Zhang

et al. 2024

Anal. Methods

View full text Add to dashboard Cite

show abstract

“…The method can characterize the internal freshness of milk, but requires skilled technicians, analytical equipment, and a long measurement period. Hwang et al [8] found that the electrical conductivity freshness index can predict the growth of TAB, PCB, and LAB in milk. However, the electrical conductivity method is limited to specific contaminants and temperature ranges, and the model works well at 20 • C, which is significantly higher than the typical refrigeration temperature.…”

Section: Introductionmentioning

confidence: 99%

Discrimination of Milk Freshness Based on Synchronous Two-Dimensional Visible/Near-Infrared Correlation Spectroscopy Coupled with Chemometrics

Peng,

Xu,

Zhou

et al. 2023

Molecules

View full text Add to dashboard Cite

Milk is one of the preferred beverages in modern healthy diets, and its freshness is of great significance for product sales and applications. By combining the two-dimensional (2D) correlation spectroscopy technique and chemometrics, a new method based on visible/near-infrared (Vis/NIR) spectroscopy was proposed to discriminate the freshness of milk. To clarify the relationship be-tween the freshness of milk and the spectra, the changes in the physicochemical indicators of milk during storage were analyzed as well as the Vis/NIR spectra and the 2D-Vis/NIR correlation spectra. The threshold-value method, linear discriminant analysis (LDA) method, and support vector machine (SVM) method were used to construct the discriminant models of milk freshness, and the parameters of the SVM-based models were optimized by the grid search method and particle swarm optimization algorithm. The results showed that with the prolongation of storage time, the absorbance of the Vis/NIR spectra of milk gradually increased, and the intensity of autocorrelation peaks and cross peaks in synchronous 2D-Vis/NIR spectra also increased significantly. Compared with the SVM-based models using Vis/NIR spectra, the SVM-based model using 2D-Vis/NIR spectra had a >15% higher prediction accuracy. Under the same conditions, the prediction performances of the SVM-based models were better than those of the threshold-value-based or LDA-based models. In addition, the accuracy rate of the SVM-based model using the synchronous 2D-Vis/NIR autocorrelation spectra was >97%. This work indicates that the 2D-Vis/NIR correlation spectra coupled with chemometrics is a great pattern to rapidly discriminate the freshness of milk, which provides technical support for improving the evaluation system of milk quality and maintaining the safety of milk product quality.

show abstract

Rapid freshness evaluation of cow milk at different storage temperatures using in situ electrical conductivity measurement

Cited by 12 publications

References 31 publications

Early Spoilage Detection of Cultured Pacific White Shrimp Using Quartz Crystal Microbalance Gas Sensors

Early Spoilage Detection of Cultured Pacific White Shrimp Using Quartz Crystal Microbalance Gas Sensors

PCB-C⁴D coupled with paper-based microfluidic sampling for the rapid detection of liquid conductivity

Discrimination of Milk Freshness Based on Synchronous Two-Dimensional Visible/Near-Infrared Correlation Spectroscopy Coupled with Chemometrics

Contact Info

Product

Resources

About

Rapid freshness evaluation of cow milk at different storage temperatures using in situ electrical conductivity measurement

Cited by 12 publications

References 31 publications

Early Spoilage Detection of Cultured Pacific White Shrimp Using Quartz Crystal Microbalance Gas Sensors

Early Spoilage Detection of Cultured Pacific White Shrimp Using Quartz Crystal Microbalance Gas Sensors

PCB-C4D coupled with paper-based microfluidic sampling for the rapid detection of liquid conductivity

Discrimination of Milk Freshness Based on Synchronous Two-Dimensional Visible/Near-Infrared Correlation Spectroscopy Coupled with Chemometrics

Contact Info

Product

Resources

About

PCB-C⁴D coupled with paper-based microfluidic sampling for the rapid detection of liquid conductivity