本文選題：氨氮 + 在線監(jiān)測��； 參考：《環(huán)境污染與防治》2016年12期

【摘要】：針對低濃度、較高濃度兩種實(shí)際水體,分別選擇氨氣敏電極法(簡稱電極法)、納氏試劑分光光度法及水楊酸-次氯酸鹽分光光度法(簡稱水楊酸法)3種不同原理水質(zhì)氨氮在線監(jiān)測儀,通過標(biāo)準(zhǔn)物質(zhì)核查、實(shí)際水體比對、加標(biāo)回收測試及長時(shí)間連續(xù)在線監(jiān)測4個(gè)方面對監(jiān)測數(shù)據(jù)準(zhǔn)確性進(jìn)行比較分析。結(jié)果表明:(1)電極法在低濃度水體中監(jiān)測結(jié)果準(zhǔn)確性不足,低濃度標(biāo)準(zhǔn)物質(zhì)核查合格率僅為46.20%,測試結(jié)果與真值差異顯著(T檢驗(yàn)),連續(xù)在線測試的氨氮大于0.15 mg/L(《地表水環(huán)境質(zhì)量標(biāo)準(zhǔn)》(GB3838—2002)中Ⅱ類標(biāo)準(zhǔn)(0.15mg/L氨氮≤0.5mg/L)),遠(yuǎn)高于真值(約0.03mg/L);其余兩種方法表現(xiàn)良好。(2)水楊酸法在較高濃度水體中受到干擾,連續(xù)在線監(jiān)測結(jié)果偏低,初步分析與加裝前處理過濾裝置有關(guān),其準(zhǔn)確性還需進(jìn)一步研究;其余兩種方法表現(xiàn)良好。
[Abstract]:For two kinds of real water bodies with low concentration and high concentration, Ammonia gas sensitive electrode method (abbreviated as electrode method), Nessler's reagent spectrophotometry and salicylic acid-hypochlorite spectrophotometry (salicylic acid-hypochlorite spectrophotometry) were selected respectively. The accuracy of monitoring data is compared and analyzed in four aspects: actual water body comparison, standard adding recovery test and long time continuous on-line monitoring. The results showed that the accuracy of the monitoring results of the electrode method in low concentration water was insufficient. The qualified rate of verification of low concentration reference materials is only 46.20. The difference between the test results and the true value is significant. The ammonia nitrogen of continuous on-line testing is greater than 0.15 mg / L (Surface Water Environmental quality Standard, GB3838-2002), the class 鈪，

本文編號(hào)：2040565