以近紅外線分光光度計偵測梨果採收前之糖度

Determining the Sugar Content of Immature Pear Fruits by Near-infrared Spectrophotometer

李汪盛(Wang-Sheng Li)

《桃園區農業改良場研究彙報》 50期 (2002/09) Pp. 7-16

https://doi.org/10.29567/ZHWHGX.200209.0002

摘要

利用化學分析方法分析梨果化學組成，可以用來評估梨果品質，但是費時且容易造成環境污染。本研究研發之近紅外線分光光度計包括光纖探針、分光光度計（範圍400－2498 nm）及電腦等設備，可應用於快速偵測未成熟梨果糖度做為水果生產、管理及採收時間之參考。經由一階差分轉換處理後之光譜，再利用部分最小平方法分析，結果顯示，利用6個因子之部分最小平方法，所建立之梨果糖度校正線，交叉驗證之判定係數（r^2(下標 cv)）為0.86，交叉證標均方根誤差（RMSECV）為0.29°Brix。

關鍵字

近紅外線 ； 水果 ； 糖度

並列摘要

Measurement of the chemical compositions for pear fruits by wet chemical methods can be used for evaluating the pear quality, but they are time-consuming, and polluting. A near-infrared reflectance spectrophotometer system, including an optical fiber probe, a spectrophotometer ranging from 400 urn to 2498 um, and a computer were developed to calibrate sugar content in immature pear fruits, which can be employed to fruit's production, management and timing of harvest. The PLSR model based on the six principal components accounted for 86% of variation in sugar content data with first derivative pretreatment and root mean square error of cross-calibration (RMSECV) was 0.29 °Brix.

並列關鍵字

Near-infrared ； fruit ； sugar content