【作者】 郭金英； 李丽； 刘松利；

【Author】 Guo Jin-ying Li Li Liu Song-li (Food & Bioengineering Department,Henan University of Science and Technology,Luoyang 471003)

【机构】 河南科技大学食品与生物工程学院；

【摘要】 研究利用石墨炉原子吸收光谱法直接测定葡萄酒中的痕量铅的快速分析方法。通过对灰化温度、背景扣除、基体改进剂等三方面的研究,确定了测定葡萄酒中重金属元素铅的适宜条件。用0.5%的硝酸调节葡萄酒,磷酸二氢铵作基体改进剂,最佳灰化温度700℃,NH₄H₂PO₄扣除背景,氩气作保护气是进行红葡萄酒中铅测定的适宜的条件。在优化条件下测定各重金属的加标回收率为91.3～108.4%,相对标准偏差为1.87～9.12%。用优化的石墨炉原子吸收检测方法对国产红葡萄酒中铅含量进行检测,结果表明,所检测的红葡萄酒中铅含量均在国家规定的标准之内。更多还原

【Abstract】 A rapid analysis method of directly trace plum bum （Pb） determination in wine were studied by graphite furnace atomic absorption spectrophotometry （GF-AAS）.We determined the wine of heavy metals through the ash temperature,background deduction and the matrix modifier.The results showed recovery was 91.3-108.4%,relative standard deviation was 1.87-9.12 percent with 0.5 percent nitric acid regulation of wine, the temperature of 700℃gray,NH₄H₂PO₄ deduction background,argon gas for the protection of determination.We determined the content of Pb in four wine by improved graphite furnace atomic absorption spectrophotometry.The result showed Pb content of wine had not over limited content.更多还原