【摘要】 为简化生活饮用水源中硝酸根和亚硝酸根的检测。去除水中的CO3 2 及浊度的干扰 ,以“减法技术”求导 ,用导数 比导数波谱法测定环境水样中硝酸根和亚硝酸根含量。结果表明本法很好地消除了导数光谱值较小的物质及仪器噪声带来的干扰。回收率为 96.7%～ 10 2 .5 %。更多还原

【Abstract】 A derivative ratio derivative spectrum method was devised for resolving the interference of two components in a two component mixture measured in derivative spectrum method. The ratio derivative spectrum was obtained from the derivative absorption spectrum of the mixture divided by a derivative absorption spectrum of one of the components. The derivative of ratio derivative spectrum against wavelength resulted in the derivative ratio derivative spectrum that was determined by the concentration of one component of the mixture. The results suggest that this method is better than ratio derivative spectrum method and it can be applied for determining nitrate and nitrite (NO - 3 and NO - 2) in environment water samples. Being simple and stable, it can eliminate the influence of the interfering materials, giving a recovery rate of more than 96.7%. [更多还原