Nondestructive measurement of acidity of Chinese bayberry using Vis/NIR spectroscopy techniques

In this research, the potential of using the Visible/Near Infrared Spectroscopy (Vis/NIRS) was investigated for measuring the acidity of Chinese bayberry (Myrica rubra Sieb.et Zucc. ), and the relationship is established between nondestructive Vis/NIR spectral measurement and the major physiological property of Chinese bayberry. Intact Chinese bayberry fruit were measured by reflectance Vis/NIR in 325-1075 nm range. The data set as the logarithms of the reflectance reciprocal (absorbance (loglIR)) was analyzed in order to build the best calibration model for this characteristic, using some spectral pretreatments and multivariate calibration techniques such as partial least square regression (PLS). The models for the pH (r=0.963), standard error ofprediction (SEP) 0.21 with a bias of 0.138; shown the excellent prediction performance. The Vis/NIR spectroscopy technique had significantly greater accuracy for determining the pH. It was concluded that the Vis/NIRS measurement technique seems reliable to assess the quality attribute of Chinese bayberry nondestructively.

[1]  K. Peiris,et al.  Near-infrared Spectrometric Method for Nondestructive Determination of Soluble Solids Content of Peaches , 1998 .

[2]  E. V. Thomas,et al.  Partial least-squares methods for spectral analyses. 1. Relation to other quantitative calibration methods and the extraction of qualitative information , 1988 .

[3]  Rainer Künnemeyer,et al.  Internal Quality Assessment of Mandarin Fruit by vis/NIR Spectroscopy , 2003 .

[4]  Kerry B. Walsh,et al.  Non-invasive assessment of pineapple and mango fruit quality using near infra-red spectroscopy , 1997 .

[5]  B. Nicolai,et al.  NON-DESTRUCTIVE MEASUREMENT OF ACIDITY, SOLUBLE SOLIDS, AND FIRMNESS OF JONAGOLD APPLES USING NIR-SPECTROSCOPY , 1998 .

[6]  D. Slaughter.  Nondestructive Determination of Internal Quality in Peaches and Nectarines , 1995 .

[7]  G. S. Birth,et al.  INSTRUMENT FOR NONDESTRUCTIVE MEASUREMENT OF SOLUBLE SOLIDS IN HONEYDEW MELONS , 1990 .

[8]  Sumio Kawano,et al.  Prediction of ripe-stage eating quality of mango fruit from its harvest quality measured nondestructively by near infrared spectroscopy , 2004 .

[9]  G. Batten.  Plant analysis using near infrared reflectance spectroscopy : the potential and the limitations , 1998 .

[10]  S. Kawano,et al.  On-Tree Evaluation of Harvesting Quality of Mango Fruit Using a Hand-Held NIR Instrument , 2003 .

[11]  V. Mcglone,et al.  Vis/NIR estimation at harvest of pre- and post-storage quality indices for 'Royal Gala' apple , 2002 .

[12]  H. Schulz,et al.  Classification and analysis of citrus oils by NIR spectroscopy , 2001 .

[13]  Shyam Narayan Jha,et al.  Non‐destructive determination of acid–brix ratio of tomato juice using near infrared spectroscopy , 2004 .

[14]  Rainer Künnemeyer,et al.  A Low-Cost System for the Grading of Kiwifruit , 1999 .