论文部分内容阅读
将乙酸溶液加入到清洗后的不锈钢食具容器中,加热至沸腾30min后冷却,及时补充乙酸溶液至原来的体积,在室温下浸泡约24h,之后应用原子发射光谱法测定溶液中12种重金属元素的含量。将干扰小、强度高的光谱线作为元素测定的分析线,同时对设备的工作参数进行科学的调整,结果发现,将发生器的射频功率设置为1250w,载气流量设置为0.6L/min,观测高度设置为16mm时,12种重金属元素的质量浓度均在0.08~1.5mg/L范围内浮动,浓度与光谱线的强弱表现为线性关系,检出限在0.001~0.013mg/L范围内,重金属元素的回收率在98.2%~104%范围内,对浸出液平行测定10次后发现测定值的相对标准偏差均在3.0%以下。
The acetic acid solution was added to the cleaned stainless steel food container, heated to boiling 30min after cooling, and timely replenish the acetic acid solution to its original volume, soak at room temperature for about 24h, after which the application of atomic emission spectrometry Determination of 12 kinds of heavy metal elements in solution Content. The interference of small, high intensity of the spectral line as the elemental determination of the analysis line, while the scientific parameters of the device to adjust the work and found that the generator RF power is set to 1250w, carrier gas flow is set to 0.6L / min, When the observation height was set to 16mm, the concentrations of 12 kinds of heavy metal elements fluctuated in the range of 0.08-1.5mg / L, and the linear relationship was found between the concentration and the intensity of the spectral line. The detection limit was in the range of 0.001-0.013mg / L , The recoveries of heavy metal elements ranged from 98.2% to 104%, and the relative standard deviations of the measured values were found to be below 3.0% after the leaching solution was measured 10 times in parallel.