本法适用于测定重整原料油,汽油,航煤等轻质油品中ppb级砷。采用加入过氧化氢及硫酸加热破坏有机物,使有机砷转化为无机砷,经预还原后,在酸性介质中加入硼氢化钾(钠)还原,生成共价氧化物,由载气送入电热石英管中原子化,从而进行原子吸收测定。本法灵敏度为5×10~(-9)g,精度为3.2%,检测限为0.3ppb。一主要仪器与试剂国产GGX-1型原子吸收分光光度计; 日本进口砷空心阴极灯; 自制氢化物发生器(如图1所示)。 This Law is applicable to the determination of ppb grade arsenic in light oil such as reforming feedstock, gasoline, jet fuel and so on. By adding hydrogen peroxide and sulfuric acid to destroy the organic matter, the organic arsenic is transformed into inorganic arsenic. After pre-reduction, potassium borohydride (sodium) reduction is added to the acidic medium to generate the covalent oxide, and the carrier gas is sent into the electrothermal quartz The tube was atomized to perform atomic absorption spectrometry. The sensitivity of this method is 5 × 10 ~ (-9) g, the precision is 3.2% and the detection limit is 0.3ppb. A major instrument and reagent Domestic GGX-1 atomic absorption spectrophotometer; Japan imported arsenic hollow cathode lamp; made hydride generator (Figure 1).