水质化学 meaning in Chinese

hydrochemistry

Water quality - determination of the chemical oxygen demand - dichromate method
水质化学需氧量的测定重铬酸盐法
A comparision of the water quality between ground water and yellow river water in heze
菏泽市地下水与黄河水水质化学指标的比较
Chemometrics study of water quality on different water samples polluted by volatile organic compounds
挥发性有机物污染的水质化学计量学研究