Quantitative detection of soluble solids content, pH, and total phenol in Cabernet Sauvignon grapes based on near infrared spectroscopy

Abstract

Determination of Cabernet Sauvignon grapes quality plays an important role in commercial processing. In this research, a rapid approach based on near infrared spectroscopy was proposed to the determination of soluble solids content (SSC), pH, and total phenol content (TPC) in entire bunches of Cabernet Sauvignon grapes. Standardized normal variate (SNV) and competitive adaptive weighted sampling (CARS), genetic algorithm (GA), and synergy interval partial least squares (si-PLS) were used to optimize the spectral data. With optimal combination input, the prediction accuracy of partial least squares regression (PLSR) and support vector regression (SVR) models was compared. The results showed that these models based on variable optimization method could predict well the SSC, pH, and TPC of Cabernet Sauvignon grapes. The correlation coefficient of prediction for SSC, pH, and TPC had reached more than 0.85. This work provides an alternative to analyze the chemical parameters in whole bunch of Cabernet Sauvignon grape.

Nondestructive detection of tomato quality based on multiregion combination model

“…Microscopically, the SSC, TA, VC, and other compounds in different parts of fruit tomato are different, and these compounds contain a large number of hydrogen‐containing groups, such as C‐H, O‐H, and N‐H. The different shapes of the spectrum are the result of the selective absorption and reflection of light by these groups (Luo et al, 2021). This shows that it is of great practical significance for studying the combination of different parts of fruit tomatoes.…”

“…The different shapes of the spectrum are the result of the selective absorption and reflection of light by these groups (Luo et al, 2021). This shows that it is of great practical significance for studying the combination of different parts of fruit tomatoes.…”

Involvement of Anthocyanin Biosynthesis of Cabernet Sauvignon Grape Skins in Response to Field Screening and In Vitro Culture Irradiating Infrared Radiation

“…Further, different wavelength ranges have varying detection characteristics. In grapes, NIR detects the volatile compounds, total soluble solids, pH, and titratable acidity of the berries 13,14,16 and the phenolic compounds and anthocyanins in the skins. 12,17−19 It can also be used to assess the phenolic extractability of grape seeds.…”

“…IR radiation is primarily used to monitor and assess the composition and quality of grape berries, including the flesh, skin, and seeds of grape berries, without destroying the samples. − IR radiation includes near-infrared (NIR), mid-infrared (MIR), and far-infrared (FIR) radiations. Further, different wavelength ranges have varying detection characteristics.…”

“…Further, different wavelength ranges have varying detection characteristics. In grapes, NIR detects the volatile compounds, total soluble solids, pH, and titratable acidity of the berries ,, and the phenolic compounds and anthocyanins in the skins. ,− It can also be used to assess the phenolic extractability of grape seeds . MIR can be used to analyze the content of monomeric anthocyanins in grape berries or wines, which helps predict their color evolution during red winemaking. , Fruit color has been one of the primary characteristics of wine grapes and has long been a concern to viticulturists and winemakers.…”