Evaluation of Internal Quality of Fresh‐cut Pomelo Using Vis/Nir Transmittance

Nondestructive techniques based on visible and near‐infrared (Vis/NIR) spectroscopy were used for evaluation of the internal quality of fruit products. The objectives of the study were to investigate the feasibility of using Vis/NIR spectroscopic devices in transmission mode to predict the soluble solids content (SSC) and total acidity (TA) of fresh‐cut Kao Numpung pomelo. The determination of SSC and TA could be successfully performed through Vis/NIR spectroscopy using partial least squares regression. Preprocessing methods and interval partial least squares (iPLS) algorithms were analyzed. The results indicated that Vis/NIR spectrophotometry in combination with preprocessing techniques can be applied to predict the soluble solids and TA of fresh‐cut Kao Numpung pomelo. The optimal SSC model was established by standard normal variate transformation. The TA prediction model could be simplified by iPLS regression. PRACTICAL APPLICATIONS The research presents Vis/NIR spectroscopy that has been used for evaluation of the soluble solids and TA of fresh‐cut Kao Numpung pomelo. The results indicated that Vis/NIR spectroscopy devices combined with preprocessing techniques could be used to predict the internal quality of fresh‐cut Kao Numpung pomelo. Further, they can be used to develop an online system for the prediction of the internal quality of fresh‐cut pomelos.