Vol. 12, Issue 2 (2023)

Author(s):
GK Bagri, P Raha, DK Bagri and DL Bagdi

Abstract:
The rain water samples were estimated in the laboratory of Soil Science and Agricultural Chemistry Department at the Institute of Agricultural Sciences, Banaras Hindu University, Varanasi during 2015. The rain water samples of Babatpur are relatively free from industrial pollution were examined during south-west monsoon period (July to September) in Varanasi using standardize collection and analytical techniques for evaluation chemical composition of rain water. Magnesium was found in highest amount in comparison to other cations, followed by Ca²⁺, Na⁺, K⁺ and NH⁴⁺. Thus, the order of alkali metal cations found in rain water in Varanasi was as follows: Mg²⁺>Ca²⁺>Na⁺>K⁺. The titrimetric techniques were employed for the determination of Cl^-, CO₃^2-, HCO₃^-, and NO₃^- and PO₄^3- were estimated by colorimetric methods. It was observed that basic anions content (CO₃^2- and HCO₃^-) in rain water of Varanasi was found much higher than acidic anions content (Cl^- + SO₄ ^2- + NO₃^- + PO₄^3- ).