在测定食品中铅的过程中,样品消解是很关键的一步,而消化过程所使用的硝酸试剂中铅本底的高低决定了检测结果的质量。国产硝酸试剂价格低廉但本底含量很高,进口试剂本底含量低但价格昂贵。在实验中大批量使用进口硝酸试剂,成本非常高,相对使用大批量经过提纯的硝酸则节约很多 Sample digestion is a crucial step in the determination of lead in food, and the quality of the test results is determined by the level of lead in the nitric acid reagent used in the digestion process. Domestic nitric acid reagents cheap but high background content, import reagents low background but expensive. Large quantities of imported nitric acid reagents are used in experiments, the cost is very high, the relative use of large quantities of purified nitric acid can save a lot of