水质凯氏氮的测定气相分子吸收光谱法

HJHJ/T1962005WaterqualityDeterminationofKjeldahlNitrogenByGasphasemolecularabsorptionspectrometry2005-11-092006-01-01IHJ/T1962005112131415162728293103113IIHJ/T196200520051192006111HJ/T196200510.020mg/L0.100mg/L200mg/L2GB118918933.1450.7S/cm5.1pH2,100ml5.2C(HCl)=6mol/L5.3C(HCl)=4.5mol/L5.45.5Mg(ClO4)28105.6(H2SO4)ρ1.845.7(K2SO4)5.85%5gCuSO4100ml5.940%200g(NaOH)600ml1000ml500ml5.100.1gC27H28O5Br2S2ml5.3100ml5.111.25gKBrO310gKBr500ml5.121.0ml5.1150ml3.0ml2HJ/T19620055.25min50ml5.9,185.130.500mg/ml1051104hNaNO22.463g1000ml5.14(20.00g/ml)5.1366.16.1.16.1.2Zn6.1.350250l6.1.4300ml05ml6.1.5()1250ml35.4PVC6.1.11236.235mA0.5L/min213.9nm100%117%7pH22588.18.1.11250ml2.5ml5.61.2g5.70.4ml5.830min100ml3HJ/T19620051(mg/L)(ml)(mg/L)(ml)550105010510255020058.1.250g50ml30ml15.1040%5.915ml5.121820min99.15ml9.25.146.1.3050100150200250l5.142ml6.1.43ml5.30.5ml5.4g9.38.1.22.0ml9.210mµgm0µgV1mlVml11()502100/,10××−=VVmmLmgN411.1HJ/T19620051.00mg/L0.05mg/Ln=60.991.03mg/L1.00mg/L0.05mg/L11.21.00mg/L0.05mg/L1.01mg/L1.0%10g98.0%101%