火焰原子吸收分光光度法测定金属中的铅已广泛得到应用 ,但对无背景校正装置的仪器 ,在测定高盐食品如酱油中铅含量时干扰很大无法测定 ,本文采用邻近线背景扣除火焰原子吸收法 ,从待测元素的吸光度减去非吸收线测得的吸光度 ,其总值之差就是原子吸收部分 ,达到扣除背景吸收的 Flame atomic absorption spectrophotometry has been widely used in the determination of lead in metals. However, for instruments without a background correction device, the determination of lead in high-salt foods such as soy sauce can not be determined by any means. In this paper, Absorption method, subtracted from the absorbance of the element to be measured Absorbance measured by non-absorbency line, the difference between the total value is the atomic absorption part, to deduct the background absorption