Development of Portable Device for Moisture Content Determination of Para Rubber Sheet Based on Near Infrared Spectroscopy

Main Article Content

อมรฤทธิ์ พุทธิพิพัฒน์ขจร
อมรเดช พุทธิพิพัฒน์ขจร

Abstract

Para rubber sheet is one of the primary products of natural rubber, which used in various rubber industries. High quality Para rubber sheet must be clean without air bubble, consistency of beautiful color, and has a moisture content in line with an accepted standard value. Nowadays, Para rubber quality needs to be evaluated by the experts only. Therefore, this research aims to develop a portable device for moisture content determination of Para rubber sheet, leading to more accurate quality evaluation comparing to the traditional method. The research composed of 2 parts, i.e. the development of portable spectrometer in the range of 900-1700 nm worked with smart phone, and the development of prediction model for moisture content determination using partial least squares regression (PLSR) with 3 different spectra pretreatment methods (standard normal variate (SNV), the 1st derivative, and the 2nd derivative). The experiments revealed that the model based on the 1st derivative presented the best prediction results as represented by coefficient of determination (R2) of 0.977, root mean square error for prediction (RMSEP) of 0.227 %db, and residual prediction deviation (RPD) of 6.576, respectively.

Article Details

Section
Engineering and Architecture
Author Biographies

อมรฤทธิ์ พุทธิพิพัฒน์ขจร

ภาควิชาวิศวกรรมอาหาร คณะวิศวกรรมศาสตร์ กำแพงแสน มหาวิทยาลัยเกษตรศาสตร์ วิทยาเขตกำแพงแสน อำเภอกำแพงแสน จังหวัดนครปฐม 73140

อมรเดช พุทธิพิพัฒน์ขจร

ภาควิชาวิศวกรรมคอมพิวเตอร์ คณะวิศวกรรมศาสตร์ กำแพงแสน มหาวิทยาลัยเกษตรศาสตร์ วิทยาเขตกำแพงแสน อำเภอกำแพงแสน จังหวัดนครปฐม 73140

References

Rubber Research Institute, Rubber Authority of Thailand, Available Source: http://km.rubber.co.th/index.php?option=com_content&view=article&id=4350:2012-06-05-03-56-20, June 5, 2555. (in Thai)

Davies, A.M. and Grant, A., 1987, Review: Near-infra-red analysis of food, Int. J. Food Sci. Technol. 22: 191-207.

Suchata, S., Theanjumpolb, P. and Karrila, S., 2015, Rapid moisture determination for cup lump natural rubber by near infrared spectroscopy, J. Ind. Crop Prod. 76: 772-780.

Chowbankrang, R., 2010, Nondestructive Evaluation of Viscosity of Field Latex and Concentrated Latex for Factory Laboratory by Near Infrared Spectroscopic Technique, King Mongkut's Institute of Technology Ladkrabang, Bangkok, 76 p. (in Thai)

Sirisomboon, P., Kaewkuptong, A. and Williams, P., 2013, Feasibility study on the evaluation of the dry rubber content of field and concentrated latex of Para rubber by diffuse reflectance near infrared spectroscopy, J. Near Infrared Spec. 21: 81-88.

Rittiron, R., Thanapatai, D., Narongwong wattana, S., Sridao, P., Penthisarn, P. and Ngowsakul, V., 2012, Development of LED based near infrared spectrometer for dry rubber content determination of Para rubber sheet, Agric. Sci. J. 43(3): 63-66. (in Thai)

Chuavapradit, C., Chaisrichonlatarn, P. and Hnusawat, S., 2012, A study on the correlation between the moisture and electric properties of rubber sheet, 13th Thai Society of Agricultural Engineering International Conference on Agricultural Engineering, Chiang Mai, 553 p. (in Thai)

Martens, H. and Naes, T., 1989, Multi variate Calibration, John Wiley & Sons Inc., New York, 504 p.

Chang, C.W., Laird, D.A., Mausbach, M.J. and Hurburgh, J.C.R., 2001, Near-infrared reflectance spectroscopy – principal components regression analysis of soil properties, Soil Sci. Soc. Am. J. 65: 480-490.

Rittiron, R. and Seehalak, W., 2014, Moisture content in raw rubber sheet analyzed by transflectance near infrared spectroscopy, J. Innov. Opt. Health Sci. 7: 1350068.

Osborne, B.G., Fearn, T. and Hindle, P.H., 1993, Practical NIR Spectroscopy with Applications in Food and Beverage Analysis, Longman Science & Technology, Harlow.