【摘要】：水質(zhì)中氨氮對(duì)于水環(huán)境和人體健康有著極大的影響,水質(zhì)中氨氮一直是水質(zhì)監(jiān)測(cè)的重點(diǎn)項(xiàng)目,文章依靠納氏試劑比色法為分析手段,來(lái)檢測(cè)水樣中的氨氮濃度。文章利用100g/L硫酸鋅將水樣進(jìn)行預(yù)處理,30%NaOH將水樣pH調(diào)節(jié)為10,1mL納氏試劑與樣本中氨氮發(fā)生化學(xué)反應(yīng)顯色10min后,在分光光度計(jì)進(jìn)行測(cè)定。試驗(yàn)結(jié)果表明:在0.0~2.0ug/mL范圍內(nèi),線性關(guān)系式為y=0.207 6x+0.010 3,R2=0.999 1。該方法的精密度為2.25%~8.39%,加標(biāo)回收率為97.5%~107.5%,經(jīng)過(guò)實(shí)際樣品驗(yàn)證后,說(shuō)明該方法是一種準(zhǔn)確,快速的測(cè)定水質(zhì)中氨氮的方法。
[Abstract]:Ammonia nitrogen in water quality has great influence on water environment and human health. Ammonia nitrogen in water quality has always been the key item of water quality monitoring. This paper relies on Nessler reagent colorimetric method to detect the concentration of ammonia nitrogen in water samples. In this paper, the water sample was pretreated with 100g/L zinc sulfate, and the pH of the water sample was adjusted to 10 by 30%NaOH. After 1 mL Nessler reagent reacted with ammonia nitrogen in the sample, the color 10min was determined by spectrophotometer. The experimental results show that in the range of 0.0~2.0ug/mL, the linear relationship is y 鈮，

本文編號(hào)：2518488