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[摘要]
分别采用混合酸湿法消化、干法灰化对咖啡豆进行处理,采用火焰原子吸收光谱法对焙烤咖啡豆中的铜进行测定,在试验条件下,本法检出限为0.01 mg/L,相关系数为0.9999,样品湿法消化加标回收率为96.9%~99.1%,干法灰化加标回收率为92.0%~97.4%,相对标准偏差为0.49%~2.20%,用本法对咖啡豆和3种标准物质中的铜进行测定,结果满意。
[Key word]
[Abstract]
The contents of copper in baked coffee beans were determinated by FAAS. Under the analytical conditions, the detection limit was 0.01 mg/L with the correlative coefficient being of 0.9999 and the coefficient of variation being of 0.49%~2.20%.. The recovery rates for the samples treated by the mixture of nitric acid and perchloric acid and dry ashing method were 96.9%~99.1% and 92.0%~97.4%, respectively. The method was suitable for used for the determination of copper in baked coffee beans and three standard materials.
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