对不同红葡萄酒前处理方法进行了研究,建立了石墨炉原子吸收检测红葡萄酒中铅含量的方法。红葡萄酒分别用直接稀释、蒸发浓缩、H2O2-HNO3消解、HClO4-HNO3消解和微波消解等5种前处理方法进行消化处理,以抗坏血酸,磷酸二氢铵,硝酸镁,氯化钯作为基体改进剂,研究选择基体改进剂合适种类及用量,对石墨炉检测法的测定条件进行研究。结果表明最佳基体改进剂为抗坏血酸,吸入量为5μL。直接稀释、蒸发浓缩、H2O2-HNO3消解、HClO4-HNO3消解和微波消解5种不同前处理的相对标准偏差5%左右,微波消解的RSD(%)为3.2。微波消解-石墨炉原子吸收光谱法检测红葡萄酒中铅,该方法快速简单、精密度和准确度高,是红葡萄酒中铅含量测定的理想方法。

Plum bum(Pb) determination in red wine by graphite furnace atomic absorption spectrometry(GFAAS) was established through the research of pre-treatment method.The optimum conditions for determination of Pb in red wine were studied by five different pre-treatments.Result showed that the best matrix modifier agent was ascorbic acid,its inhalation volume was 5μL.These pre-treatments were: direct dilution,evaporation concentration,H2O2-HNO3 digestion,HClO4-HNO3 digestion and microwave digestion.The standard deviation was about 5%;the microwave dispels RSD was 3.2%.This method is rapid and accurate and can be used in the detection of Pb.