余氯测定-碘量法

1HZHJSZ00149HZ-HJ-SZ-01491()pH3.5~4.25mg/L22KI2CH3COOH2CH3COOK2HI2HIHOClI2HClH2O(2HIC122HClI2)I22Na2S2O32NaINa2S4O6HOClOClNH2C1NHCl233.1()3.2(1+5)3.3(1/6K2Cr2O70.0250mol/L)1.2259g1000mL3.40.05mol/L12.5g(Na2S2O35H2O)1000mL0.2g20.00mL50mL1g5mL(15)5min1mL1%(Cr3)c20.00/Vc(mol/L)20.00(mL)V(mL)3.50.0100mol/L0.05mol/L53.610g/L3.7(pH4)146g457mL1000mL4250~300mL56中国分析网26.1100mL(1mg/L200mL300mL0.5g5mL6.20.0100mol/L1mL7c(Cl2mg/L)cV135.461000/Vc(mol/L)V1(mL)V(2m1L35.46(C12)(g/mol)5mLpH3.5~4.2pHpH48pp.345~3461997中国分析网