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題名 | 以手提式近紅外線分光光度計非破壞性偵測蘋果內部品質=Nondestructive Determination of Internal Quality in Apple by a Portable Near-Infrared Reflectance Spectrophotometer |
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作 者 | 李汪盛; 蕭介宗; | 書刊名 | 桃園區農業改良場研究彙報 |
卷期 | 43 2000.12[民89.12] |
頁次 | 頁45-54 |
分類號 | 435.311 |
關鍵詞 | 蘋果; 近紅外線分光光度計; 糖度; 酸度; 糖酸比; Apple; Portable near-infrared reflectance spectrophotometer; Sugar content; Acid content; Ratio of sugar content to acid content; |
語文 | 中文(Chinese) |
中文摘要 | 利用化學分析方法分析蘋果化學組成,可以用來評估頭果品質,但是費時且容易造成環境污染。本研究研發之手提式近紅外線分光光度計包括光纖探針、二極體陣列式光譜儀(範圍925-1716nm)及手提電腦等設備,可應用於快速偵測蘋果糖度、酸度含量及糖酸比。經由一階差分(糖度、酸度)或二階差分(糖酸比)轉換處理後之光譜,再利用部分最小平方法分析,分析結果顯示,利用14、11及5個因子之部分最小平方法所建立之頭果糖度、酸度含量及糖酸比校正線,交叉驗證之判定係數(r2cv)分別為0.878、0.912及0.845,交叉證標準偏差(SECV)分別為0.433°Brix、0.027g/100g及5.390°Brix100g/g。 |
英文摘要 | Measuring the chemical compositions of apple by wet chemical methods can be used for evaluating the apple quality, but they are time-consuming, and polluting. A portable near-infrared reflectance spectrophotometer system which includes an optical fiber probe, a diode array spectrophotometer, ranging from 925 nm to 1716 nm, together with a portable computer were developed to calibrate sugar content, acid content and ratio of sugar content to acid content in apple for a quick evaluation of apple quality. With first derivative pretreatment for sugar and acid content's analysis and with second derivative pretreatment for ratio of acid content to sugar content's analysis of each original absorbance spectrum and then analyses by partial least-squares regression, the calibration curve of sugar content, acid content and ratio of acid content to sugar content by employing 14, 11, 15 principal-component PLSR models had r-squared of cross validation 0.878, 0.912 and 0.845 and standard error of cross validation (SECV) 0.433°Brix, 0.027 g/100g, and 5.390°Brix 100g/g, respectively. |
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