AMPERO-PHOTOMETRIC METHOD (APM) FOR THE DETERMINATION OF COLORED SOLUTION CONCENTRATION USING A LIGHT DEPENDENT RESISTOR (LDR) | ||||
| Al-Azhar Bulletin of Science | ||||
| Article 2, Volume 30, 2-A, December 2019, Page 11-16 PDF (453.45 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/absb.2019.86752 | ||||
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| Author | ||||
Adham El-Zomrawy 
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| Department of Chemistry, Faculty of Science, Al-Azhar University, Nasr City 11884, Cairo, Egypt | ||||
| Abstract | ||||
| A simple, portable photometer depending on the intensity of the light that passes through a colored solution was designed. Through it, the measured light intensity parameter is converted to an electrical current density, which flow in a circuit of light dependent resistor (LDR). The suggested device is characterized by that it does not depend on the absorptivity at a specific wavelength, but depends on the intensity of the light passing through the sample only. The merits of this method are low power, high sensitivity, and very low cost. The proposed method is in excellent harmony with the determination of the concentration of colored solutions by spectrophotometr. | ||||
| Keywords | ||||
| Spectrophotometr; Concentration; Kinetic; LDR; LED | ||||
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