CAJ | 학술논문

用混酸（硫酸－硝酸）处理灰化的高盐食品,并用硫酸钠稀释标准系列以消除干扰。用原子吸收法测定高盐食品中的铅含量。方法的最低检出浓度为0.10mg/kg。结果表明，本法对含铅量为8.70、2.40和1.40μg的3种样品测得相对标准差分别为1.72％、5.00％和7.14％，回收率为90％～109％。本法和萃取火焰原子吸收分光光度法测定铅的结果无明显差异（P>0.05）。标准曲线相关系数前者为0.9995，后者为0.9991（P<0.05）。用硝酸溶液(0.5mol/L)溶解灰化物，消除了氯化物的干扰，直接火焰原子吸收分光光度法测定铅的结果明显高于前二者的测定结果，而且精密度、准确度高，线性关系好，完全符合卫生检验要求。
용혼산（류산－초산）처리회화적고염식품,병용류산납희석표준계렬이소제간우。용원자흡수법측정고염식품중적연함량。방법적최저검출농도위0.10mg/kg。결과표명，본법대함연량위8.70、2.40화1.40μg적3충양품측득상대표준차분별위1.72％、5.00％화7.14％，회수솔위90％～109％。본법화췌취화염원자흡수분광광도법측정연적결과무명현차이（P>0.05）。표준곡선상관계수전자위0.9995，후자위0.9991（P<0.05）。용초산용액(0.5mol/L)용해회화물，소제료록화물적간우，직접화염원자흡수분광광도법측정연적결과명현고우전이자적측정결과，이차정밀도、준학도고，선성관계호，완전부합위생검험요구。
Lead in high-salt food was measured by treating the ash withsulfuric-nitric acid, and diluting lead standard with sodium sulfate to eliminate the disturbance of chloride in detecting lead with atomic absorption spectrophotometry. The minimum detection limit was 0.10 mg/kg. The relative standard deviation is 1.72%, 5.00% and 7.14% while the amount of lead was 8.70, 2.40 and 1.40μg respectively. The recovery varied between 90.0%—109.0%. There was no significant difference (P>0.05) of the lead content between the mentioned method and extraction flame photometry. The amount of lead is higher obviously than that of other two methods by eliminating the disturbance of chloride. The method was simple, precise and accurate, and suitable for hygienic examination.