Temperature-compensation factor for measuring of concentration in solution using ultrasonic light diffraction effect

This paper describes the workings of a temperature-compensation factor V_cF for measuring concentration in solutions using an acousto-optic effect over a range of ultrasonic frequencies (f_a) (9-30 MHz) on which Raman-Nath diffraction occurs. The value of V_cF calculated by the empirical equation of the sound velocity for NaCl solution within the concentration range of 0.0 1.0%, is 9.49 mV/°C for the temperature range of 25°C±2°C. Its value is reasonably consistent with the experimental value 9.65 mV. A proportional coefficient PC_cf for NaCl solutions for V_cF over the temperature range of 20 to 30°C and ultrasonic frequency range of 9 to 30 MHz is 0.318 mV/°C.MHz. We describe measured values of sound velocity using an acousto-optic effect. We obtained the ultrasonic velocity of S_N=10.0. 20.0% which is the concentration of NaCl solutions v=1615.1, 1714.5 m/s at f_a=29.398 MHz. For the concentration of sucrose solutions s_SA=10.0, 20.0% v = 1538.6, 1572.8 m/s are obtained at f_a = 22.298 MHz.