HJ-T 197-2005 水质 亚硝酸盐氮的测定 气相分子吸收光谱法

HJHJ/T1972005WaterqualityDeterminationofNitriteNitrogenByGasphasemolecularabsorptionspectrometry2005-11-092006-01-01IHJ/T1972005112131415162728293103IIHJ/T197—200520051192006111HJ/T19720051213.9nm0.003mg/L0.012mg/L10mg/L279.5nm500mg/L22.130.150.3mol/LNO2213.9nm44.1C(C6H8O7.H2O)=0.3mol/L:64g1000ml4.24.3Mg(ClO4)28104.44.50.500mg/ml1051104h(NaNO2)2.463g,1000ml4.620.00g/ml4.555.15.1.15.1.2(Zn)5.1.350250l5.1.4300ml05ml5.1.51250ml34.3PVC5.1.12HJ/T19720055.1.650100ml4.25.235mA213.9nm100%117%0.5L/min123647NO2-0.2mg/L25mg/LSO32-10mg/LS2O32-30mg/LI-20mg/LSCN-80mg/LSn2+100mg/LMnO4-S2-4.430min88.15ml8.25.1.3050100150200250l4.62.5ml5.1.42.5ml4.10.5ml4.2µg8.32.50ml5g8.293HJ/T1972005()VmmLmgN0/,−=mµgm0µgVml1010.1NO2--N0.102mg/L0.006mg/L1.1%3.1%0.0580.396mg/L(n=6)2.3%4.6%10.20.102mg/L0.006mg/L0.102mg/L0.0%NO2--N0.1522.23g0.1822.00g93%106%