Abstract
The near infrared (NIR) spectroscopy both on-line and off-line scanning was applied on mango fruits(Mangifera indicaCV. ‘Nam dok mai- si Thong’) for the overall precision test. The reference parameter was total soluble solids content (Brix value). The results showed that the off-line scanning had a higher accuracy than on-line scanning. The scanning repeatability of the off-line and on-line systems were 0.00199 and 0.00993, respectively. The scanning reproducibility of the off-line and online systems were 0.00279 and 0.00513, respectively. The reference of measurement repeatability was 0.2. The maximum coefficient of determination (R2max) of the reference measurement was 0.894.
Highlights
Mango is an important economic crop, which can generate income for farmers in Thailand because of consumption demand in both domestic and international markets
The samples had an average spectrum scanned by FT-near infrared (NIR) spectrometer shown in Figure 1. with the interesting wavelength, including the wavelength at 6897 cmିଵ and 5569 cmିଵ, where the wavelength at the wavelength at 6897 cmିଵ was a vibration of the bond O-H str., and the wavelength at 5569 cmିଵ was a vibration of the bond O-H str
The repeatability and reproducibility of off-line scanning were less than on-line scanning, which showed that off-line scanning was more accurate than on-line scanning
Summary
Mango is an important economic crop, which can generate income for farmers in Thailand because of consumption demand in both domestic and international markets. The nam dok mai mango specie is one of the main economic crops in 10 districts of Chiang Mai, such as Phrao, Fang, Chaiprakarn, Chiang Dao, Wiang Haeng, Mae Taeng, Mae Wang, Doi Lo, Doi Tao and Mae Ai. Farmers need to improve the quality of products and maintain the export quality. Farmers need to improve the quality of products and maintain the export quality This action aims to increase the competition capacity and new options for the market, since Peru is currently provide cheaper products, which is considered a competing country for Thailand in Korean, Japanese, Chinese and Malaysian markets [1]. The general criteria that farmers use in exporting nam dok mai mango is to consider the external quality by using the eyesight, such as color, size, skin and external spoilage, etc
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