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Citation: XI Zhonghua, KONG Xuanfeng, YU Xiaodong, ZHANG Wenwei. Design and Application of Mobile-Phone Photometer Based on Light Sensor[J]. University Chemistry, ;2019, 34(1): 54-57. doi: 10.3866/PKU.DXHX201806029 shu

Design and Application of Mobile-Phone Photometer Based on Light Sensor

National Demonstration Center for Experimental Chemistry Education(Nanjing University), Nanjing 210023, P. R. China

Received Date: 22 June 2018

By using the light sensor of smartphone, a simple photometer was designed. Also, an Android APP was developed to show the online signal and calculate the absorbance automatically. This photometer uses a flow cell of HPLC UV-detector as sample absorption cell and an optical fiber to transfer the light signal. The mobile-phone photometer can greatly reduce the amount of reagents used. Only 200 μL sample is needed to run a test, which effectively reduces laboratory waste. There is a good linear relationship with R² value 0.9991 while using the photometer to measure the iron ion standard solution, which means it can replace the traditional spectrophotometer in chemical experiments. Students can enhance their understanding of the instrument principles and inspire their creativity by using this DIY photometer.
- Photometer,
- Light sensor,
- Mobile phone,
- Iron
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