1HZHJSZ00143 HZ-HJ-SZ-0143 1 1mg/L 2 3 3.1 1 mol/L 220g Zn(CH3COO)22H2O 1000mL 3.2 10g/L 3.3 1+5 3.4 0.05mol/L 12.4g(N2S2O35H20)1000mL 0.2g 250mL 1g 50mL(1/6K2Cr2O7)0.05mol/L10.00mL 1+5 5mL 5min 1mL()c(Na2S2O3)=15.00 0.05/V1-V2 V1(mL)V2(mL)0.05(mol/L)HZ-HJ-SZ-0098 4 4.1 250mL 4.2 4.3 25mL 50mL()5 1L 2mol/L 1/2Zn Ac2 2mL 6 250mL 50mL 10.0mL 5mL 3.3 5min 1mL 7 c(S2-mg/L)V0-V1c116.03 1000/V V0(mL)2 V1(mL)V(mL)16.03(1/2S2-)(g/mol)c1(mol/L)8 pp.331332 1997
