Orthotolidine test is used for determination of________________? / Environmental Engineering / By admin Orthotolidine test is used for determination of________________? A. dissolved oxygen B. residual chlorine(Correct) C. biochemical oxygen demand D. dose of coagulant
Orthotolidine test is used for determination of________________? A. dissolved oxygen B. residual chlorine(Correct) C. biochemical oxygen demand D. dose of coagulant