摘要
氨氮是评价水体黑臭分级的重要指标。采用气相分子吸收光谱法测定黑臭水体中的氨氮,当浓度范围在0.10~2.00 mg/L时,线性关系(r为0.9999)良好,方法检出限为0.009 mg/L;样品测定结果的相对标准偏差RSD(n=6)在0.96%~4.3%之间,加标回收率在91.5%~103.6%之间。干扰试验表明:样品蒸馏与否对测定结果影响不明显;F检验和t检验表明:该方法与纳氏试剂分光光度法测定结果可比(α=0.05)。该方法无需前处理、干扰小、准确度高,可用于黑臭水体中氨氮的快速检测。
Ammonia-nitrogen is an important index to evaluate the classification of black and odorous water.In this experiment,Gas-phase Molecular Absorption Spectrometry was used to determine ammonia-nitrogen in black and odorous water.When the concentration range was 0.10~2.00 mg/L,the linear relationship(r=0.9999)was good,and the detection limit was 0.009 mg/L.The RSDs(n=6)of the determination results of samples ranged from 0.96%to 4.3%,and the recoveries were between 91.5%and 103.6%.Interference test showed that whether the sample is distilled or not has no obvious effect on the monitoring results;F test and t test showed that the results of the method can be compared with those of Nessler's Reagent Spectrophotometry(α=0.05).The method has the advantages of no pretreatment,low interference and high accuracy,which can be used for the rapid detection of ammonia nitrogen in black and odorous water.
作者
马超云
谢焱鑫
王娜
李立中
杨楷炫
李思阳
Ma Chaoyun;Xie Yanxin;Wang Na;Li Lizhong;Yang Kaixuan;Li Siyang(Xiangtan Ecological Environment Monitoring Center of Hunan Province,Xiangtan,Hunan 411104,China)
出处
《绿色科技》
2023年第6期140-142,147,共4页
Journal of Green Science and Technology
关键词
黑臭水体
氨氮
气相分子
光谱法
F检验和t检验
black and odorous water
ammonia-nitrogen
gas-phase molecular
spectrometry
F test and t test.
