Daily Monitoring of Ripening Processes of a Tomato Using an Original Handheld Visible–Near-Infrared Spectrometer

Applied Spectroscopy Practica Pub Date : 2023-06-01 DOI:10.1177/27551857231181923

Satoru Nakashima, Aika Nagasawa, Kazuto Yokokura, Yasuaki Shukuin, Naoto Takeda, Kiyotaka Yamamoto

{"title":"Daily Monitoring of Ripening Processes of a Tomato Using an Original Handheld Visible–Near-Infrared Spectrometer","authors":"Satoru Nakashima, Aika Nagasawa, Kazuto Yokokura, Yasuaki Shukuin, Naoto Takeda, Kiyotaka Yamamoto","doi":"10.1177/27551857231181923","DOIUrl":null,"url":null,"abstract":"A handheld visible- and shortwave near-infrared spectrometer has been developed for monitoring daily changes in fruits and vegetables. The ripening processes of a mini tomato sample have been monitored daily for about 100 days by this instrument and color values L*a*b* and Brix were measured. Obtained reflection spectra in the 400–1050 nm range were converted to absorption spectra and daily changes of band areas of chlorophyll a (Ch1 a; 640–710 nm), carotenoids (460–520 nm), lycopene (545–600 nm), and water + sugar (920–1050 nm) were determined. The band area of lycopene increased rapidly from 36 to 44 days associated with the increase in a* value, indicating that the increase in the reddish color originated from the increase of lycopene. On the other hand, the band area of Chl a decreased exponentially over 100 days. This Chl a decrease could be well fitted by the first-order reaction giving the rate constant k = 4.07 × 10–7 s–1. These quantitative daily changes of pigments in fruits and vegetables are expected to provide comprehensive bases for their cultivation and harvest.","PeriodicalId":275513,"journal":{"name":"Applied Spectroscopy Practica","volume":"148 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Spectroscopy Practica","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1177/27551857231181923","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 1

Abstract

A handheld visible- and shortwave near-infrared spectrometer has been developed for monitoring daily changes in fruits and vegetables. The ripening processes of a mini tomato sample have been monitored daily for about 100 days by this instrument and color values L*a*b* and Brix were measured. Obtained reflection spectra in the 400–1050 nm range were converted to absorption spectra and daily changes of band areas of chlorophyll a (Ch1 a; 640–710 nm), carotenoids (460–520 nm), lycopene (545–600 nm), and water + sugar (920–1050 nm) were determined. The band area of lycopene increased rapidly from 36 to 44 days associated with the increase in a* value, indicating that the increase in the reddish color originated from the increase of lycopene. On the other hand, the band area of Chl a decreased exponentially over 100 days. This Chl a decrease could be well fitted by the first-order reaction giving the rate constant k = 4.07 × 10–7 s–1. These quantitative daily changes of pigments in fruits and vegetables are expected to provide comprehensive bases for their cultivation and harvest.

查看原文本刊更多论文

利用原始手持式可见-近红外光谱仪对番茄成熟过程进行日常监测

一种手持式可见光和短波近红外光谱仪已经开发出来，用于监测水果和蔬菜的日常变化。用该仪器对一个小型番茄样品的成熟过程进行了100天左右的每日监测，并测量了L*a*b*和Brix的颜色值。将得到的400 ~ 1050 nm范围内的反射光谱转换为吸收光谱和叶绿素a (Ch1 a;640 ~ 710 nm)，类胡萝卜素(460 ~ 520 nm)，番茄红素(545 ~ 600 nm)，水+糖(920 ~ 1050 nm)。随着a*值的增加，番茄红素的带面积在36 ~ 44天迅速增加，说明红色的增加源于番茄红素的增加。另一方面，Chl a波段面积在100 d内呈指数递减。一级反应的速率常数k = 4.07 × 10-7 s-1可以很好地拟合Chl - a的减小。这些水果和蔬菜中色素的每日定量变化有望为其种植和收获提供全面的依据。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Applied Spectroscopy Practica

自引率

0.00%

发文量