【摘要】 目的建立测定居住区大气中砷化物的石墨炉原子吸收光谱分析方法。方法将已采样的浸渍微孔滤膜微波消解后,采用氯化钯和硝酸镍体积分数为1∶1混合基体改进剂,灰化温度1 200℃,原子化温度2 500℃,用石墨炉原子吸收光谱法测定其砷化物含量。结果该方法在0～100.0μg/L范围内呈线性关系,回归方程为Y=0.005 03X+0.007 70,相关系数(r)=0.999 2;方法的重现性好,不同浓度的标准溶液测定相对标准偏差为1.04%～3.10%;方法的最低检出限1.5μg/L,高中低浓度标准溶液的回收率为100.7%～90.8%。结论该方法简便经济、快速、准确,适用于居住区大气中砷化物的测定。更多还原

【Abstract】 [Objective]To establish the method for determination of arsenide in air of residential district by graphite furnace atomic absorption spectrometry(GFAAS).[Methods]The sampled impregnated porous membrane were digested by microwave,then were determined for arsenic concentration by GFAAS with PdCl2:-NiNO3 1 ∶1 as matrix modifier,ashing temperature of 1 200 ℃,atomization temperature of 2 500 ℃.[Results]The method had a linear relationship in the range of arsenic concentrations between 0～100.0 μg/L,regression equation Y=0.00 503 X+0.00 770,r=0.9 992;the method showed a good reproducibility,RSD of standard solutions with different concentrations was 1.04%～3.10%;the detection limit was 1.5 μg/L,the recovery of standard addition was 100.7%～90.8%.[Conclusion]This method is simple,inexpensive,rapid and accurate,suitable for determination of arsenic in the air of residential districts.更多还原