Near-Infrared Rapid Detection And Near-Infrared Spectroscopy For Edible Vegetable Oil

Edible oil is necessary consumer goods in human life. It's one of important food which can provide human heat, fatty acids, and promote human body to absorb fat-soluble vitamins. Edible oil security has been the focus of the social and the government concern of food security in our country. In this paper, we design a portable Near-infrared rapid detect instrument with Near-infrared spectroscopy. The instrument is portable, simply operate, and fast. It can be used to rapid detect for edible vegetable oil.In this paper, the main content and innovations are as follows:1. We study on the Near-infrared spectroscopy and the sample analysis process by Near-infrared spectroscopy, the modeling method of quantitative analysis by Multiple Linear Regression, the evaluating method of quantitative analysis model.2. We confect the concentration from 10% to 97.5% of adulterated camellia oil samples. We collect the samples near infrared spectral data in short-wave near infrared region, propose combining Combination Generation Algorithm with Multiple Linear Regression to establish quantitative model, and write computer program to analyze the samples'spectral data. We get the best combination of filter wavelengths which can be used in the portable edible vegetable oil near infrared rapid detect instrument.3. We use the modular design method to design the instrument hardware structure. We study on the characteristics of near-infrared light. We choose near-infrared LED as the instrument lights, which have the advantages of less calorific power, low power consumption, long life, etc.; we design the instrument optical system with the LED lights, filters and Fresnel lens. We select the OPT101 as the photoelectric devices due to wide spectral response range and good dynamic characteristics of photodiode, use AD7705 as the AD collect components, and select STC51 to control the instrument and data process. The structure of the instrument is small, and the instrument is low power consumption and portable.4. The software of the instrument is divided into senior instrument software and PC software, which is modular design. The lower computer software is mainly to collect, process and upload absorbance data, and the PC software is establish quantitative analysis model with the data which from the senior instrument.