HJ-T 198-2005 水质 硝酸盐氮的测定 气相分子吸收光谱法

HJHJ/T1982005WaterqualityDeterminationofNitrateNitrogenByGasphasemolecularabsorptionspectrometry2005-11-092006-01-01IHJ/T1982005112131415162728293103IIHJ/T198200520051192006111HJ/T198200510.006mg/L10mg/L22.132.5mol/L702,NO214.4nm44.1:C(HCl)=6mol/L4.2(NH2SO3H)10%4.3(TiCl3)15%4.4Mg(ClO4)2:8104.54.61.00mg/ml1051102hNaNO33.034g500ml4.7(10.00µg/ml)4.655.15.1.15.1.2Cd5.1.35.1.4300ml05ml5.1.54010022HJ/T19820055.1.6()1250ml54.4PVC5.1.15.235mA0.5L/min214.4nm100%117%123456pH224h7NO2-210%4.2N2SO32-S2O32-H2SO40.1%SO42-4.530min88.15ml8.20.000.501.001.502.002.50ml4.72.5ml24.22.5ml4.15.1.37025.1510min5.1.40.5ml4.3µg8.325µg2.5ml8.23HJ/T19820059()VmmLmg0/−=mµgm0µgV(ml)1010.1NO3--N0.595mg/L0.026mg/L1.9%2.0%0.2821.48mg/Ln=61.7%3.2%10.20.595mg/L0.026mg/L0.592mg/L0.5%NO3--N0.76311.75g0.8310.00g91.0%106%