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本文探讨了一种干法灰化、无火焰原子吸收仪测定锌的方法。每天早晨第一次哺乳前(上午9～10点),将乳房用无离子水擦干净,用手将乳汁挤出,收集约10ml乳汁,装于30m,聚乙烯管中,于-20℃贮藏备用。分析所用容器均用1%硝酸浸泡过夜,以除去容器中锌的污染,然后浸泡于10%盐酸中至使用,以防污染。使用前用无离子水多次冲洗。锌标准贮备液(75μmol/L),称取4.9mg锌溶于5ml浓HCl中,然后用无离子水定容至1L。标准工作液:用贮备液稀释,浓度分别为32.5、75和150μmol/L。
In this paper, a dry ashing, flame atomic absorption spectrometry method for the determination of zinc. Every morning before breastfeeding (9 am to 10 am), the breasts are wiped clean with deionized water, and the milk is squeezed out by hands to collect about 10 ml of milk and put in a 30 m polyethylene tube and stored at -20 ° C spare. The vessels used for the analysis were all soaked in 1% nitric acid overnight to remove zinc from the container and then soaked in 10% hydrochloric acid for protection against contamination. Rinse twice with deionized water before use. Zinc standard stock solution (75μmol / L), weighed 4.9mg zinc dissolved in 5ml concentrated HCl, and then with deionized water to volume 1L. Standard working solution: diluted with stock solution at concentrations of 32.5, 75 and 150 μmol / L, respectively.