论文部分内容阅读
建立川藏高原冰葡萄酒中总砷含量的氢化物原子荧光光谱法测定方法。用湿法消解对冰葡萄酒进行前处理,利用单因素试验对测定条件进行优化研究。结果表明,在优化试验条件下,即灯电流60 m A,负高压270 V,载气流量300 mL/min,屏蔽气流量700 mL/min时,冰酒样品测定浓度在0~100 ng/mL范围内标准曲线呈良好线性,I_f=6.540 5C-12.69,r~2=0.999 2;方法的定量限为0.15μg/L,相对标准偏差为1.73%,加标回收率为95.6%~101.9%(n=9)。表明该方法操作方便,准确度高,重现性好,适用于冰酒总砷含量的检测与监控。
Determination of total arsenic in iced wines in Sichuan - Tibet Plateau by hydride generation atomic fluorescence spectrometry. The pretreatment of ice wine with wet digestion, the use of single factor test to optimize the determination of the conditions. The results showed that the ice wine sample concentration was in the range of 0-100 ng / mL under the optimum conditions of 60 m A of lamp current, 270 V of negative pressure, 300 mL / min of carrier gas flow and 700 mL / min of shield gas flow The internal standard curve showed a good linearity with I_f = 6.540 5C-12.69 and r ~ 2 = 0.999 2. The limit of quantification was 0.15 μg / L, the relative standard deviation was 1.73%, and the recoveries were 95.6% -101.9% (n = 9). It shows that the method is easy to operate, accurate and reproducible. It is suitable for the detection and monitoring of the total arsenic content in ice wine.