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本文提出了排气中氮氧化物(NO_x)用碱性吸收液吸收对所生成的硝酸根离子用离子色谱法进行定量。该法操作简便、迅速、准确。从样品采集到获得分析结果仅用15分钟。仪器与试剂: 1.离子色谱仪:美国Dionex制16型。 2.阴离子分离柱:Dionex制SA-Dowex2型树脂(HO型交换树脂),柱650×3 mm。 3.阳离子去除柱:Dionex制50W-X8型树脂(H型交换树脂),200～400目,柱250×6 mm。 4.溶离液:3mMNaHCO_3-2.4 mMNa_2CO_3混合溶液。 5.一氧化氮:标准一氧化氮气用锌还原萘乙二胺(Zn-NEDA)法测定,含量为102 ppm。
In this paper, the nitrogen oxides (NO_x) in the exhaust gas are absorbed by the alkaline absorption liquid to quantify the nitrate ions generated by ion chromatography. The method is simple, rapid and accurate. It takes only 15 minutes to obtain the results of the analysis from the sample collection. Instruments and Reagents: 1. Ion Chromatography: the United States made 16 types Dionex. 2. Anion Separation Column: SA-Dowex2 resin (HO type exchange resin) manufactured by Dionex, column 650 × 3 mm. 3. Cationic removal column: 50W-X8 type resin (H-type exchange resin) manufactured by Dionex, 200-400 mesh, column 250 × 6 mm. 4. Dissolution: 3mMNaHCO_3-2.4 mMNa_2CO_3 mixed solution. 5. Nitric oxide: The standard nitric oxide gas is reduced by zinc-naphthoethylenediamine (Zn-NEDA) method with a content of 102 ppm.