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Citation: Fengjun Liu, Zihan Wu, Boshang Hou, Zhiqiang Dong, Yuhua Weng, Rui Pan, Zhenling Xu, Chunyan Zhang, Yinyun Lü, Xiaoqing Ouyang, Chanzi Ruan. Design and DIY of Simple Photometer Based on the Light Sensor of Cellphone[J]. University Chemistry, ;2020, 35(9): 83-88. doi: 10.3866/PKU.DXHX201908054 shu

Design and DIY of Simple Photometer Based on the Light Sensor of Cellphone

National Demonstration Center for Experimental Chemistry Education (Xiamen University), College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361000, Fujian Province, P. R. China

Received Date: 30 August 2019

By using light sensors of the cellphone, we build a simple photometer which can be used in quantitative analysis experiments. We have performed 5 replicate measurements of iron with phenanthroline to verify reproducibility and stability. We find the absorbance of the sample has a good linear relationship with the concentrations of iron with a R² value around 0.999 and the RSD of 2.81%. The result is 4.94 μg·mL^-1 with spectrophotometer and 5.11 μg·mL^-1 with our photometer. The photometer is simple, convenient, accurate and realistic by using a phone as detector, which can replace the traditional spectrophotometer in the laboratory class. The students can enhance their understanding of the structure and principle of spectrophotometer by the DIY photometer experiment.
- Photometer,
- Self-built,
- Light sensor of cellphone
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