茶叶科学2016，Vol.36Issue(2)：184-190,7.
基于近红外光谱的红茶干燥中含水率无损检测方法
Nondestructive Measurement of Moisture of Black Tea in Drying Process Based on Near Infrared Spectroscopy
摘要
Abstract
Moisture is an important index of tea drying effect and quality. To understand rapid detection of moisture in black tea, a nondestructive testing method was proposed based on near infrared spectroscopy (NIR). The diffuse reflectance spectra of 226 tea samples were scanned in the range of 1000-1799 nm. These samples were from 6 drying processes. Moisture contents of samples were immediately measured after spectral scanning. The original spectrum data were proposed by the Standard Normal Variate Transformation (SNVT). Two regression algorithms including Partial Least Square (PLS) and Synergy Interval Partial Least Square (siPLS) were used to develop models for determination of moisture contents respectively. The result showed that both models had high accuracy, but the performance of model with siPLS was better. It contained 13 spectral intervals combined with 4 subinterval and 6 principal component factors. The root mean square for prediction (RMSEP) and the correlation coefficient (Rp) reached 0.0395 and 0.9593, respectively. It showed that it is feasible to measure moisture content of black tea during drying process.关键词
红茶/含水率/近红外光谱/模型Key words
black tea/moisture content/near infrared spectroscopy/model分类
轻工纺织引用本文复制引用
陈琳,董春旺,高明珠,叶阳..基于近红外光谱的红茶干燥中含水率无损检测方法[J].茶叶科学,2016,36(2):184-190,7.基金项目
浙江省自然科学基金(LY16C160002)、浙江省"三农六方"项目(2014005). （LY16C160002）
