Refractive Index of Reference Material under Different Measurement Conditions |
( Volume 4 Issue 4,April 2017 ) OPEN ACCESS |
Author(s): |
Soraya khodier, Salah H.R. Ali, Ihab Naeim, Adel Shehata |
Abstract: |
Refractive indices of different concentrations (5 ppm up to 200 ppm) of reference chemical solution (Fe(NO3)3) Nonahydrate were determined with an accuracy of ±10-5, the Brix of these chemicals were measured by using Digital multi-wavelengths (refractometer DSR-λ). Practically, the refractive indices of these solutions have been measured as a function of temperatures in the spectral visible range 0.4-0.7 µm; with increasing wavelengths and with increasing temperature the refractive index decreased monotonically. The refractive indices are increasing with increasing concentrations. Also, the Brix of this solution have been measured as a function of temperature (20 οC up to 30 οC) with wavelengths in the same visible spectral range. The Brix values are used as a tool of concentration of these chemicals samples. The empirical formula between the concentration and the Brix of these chemical are applied. |
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