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為了保護水環境，必須加強對污水排放的監測。檢測點的設計和檢測儀表(主要是多參數水質分析儀)的質量對水環境監測起著至關重要的作用。用化學和物理方法測定水中各種化學成分的含量。多參數水質分析儀分為簡分析、全分析和專項分析三種。簡分析在野外進行，分析項目少，但要求快而及時，適用于初步了解大面積范圍內各含水層中地下水的主要化學成分專項分析的項目根據具體任務的需要而定。另多參數水質分析儀可快速而準確的定性定量分析，并可全自動、智能化、實時在線、多參數同時進行分析，同時出結果并打印報告單。水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)是生(sheng)(sheng)(sheng)命之源，人(ren)類(lei)在生(sheng)(sheng)(sheng)活(huo)和(he)生(sheng)(sheng)(sheng)產活(huo)動中(zhong)都(dou)(dou)離不(bu)(bu)(bu)開水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)，生(sheng)(sheng)(sheng)活(huo)飲(yin)用(yong)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)質(zhi)(zhi)的(de)(de)(de)優劣(lie)與人(ren)類(lei)健(jian)康(kang)密切相關(guan)(guan)。隨(sui)著社(she)會(hui)經濟(ji)發(fa)展(zhan)、科學進步(bu)和(he)人(ren)民(min)生(sheng)(sheng)(sheng)活(huo)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)平的(de)(de)(de)提(ti)高，人(ren)們(men)對生(sheng)(sheng)(sheng)活(huo)飲(yin)用(yong)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)的(de)(de)(de)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)質(zhi)(zhi)要(yao)求(qiu)(qiu)不(bu)(bu)(bu)斷提(ti)高，飲(yin)用(yong)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)質(zhi)(zhi)標準(zhun)也相應地(di)(di)不(bu)(bu)(bu)斷發(fa)展(zhan)和(he)完善。由于生(sheng)(sheng)(sheng)活(huo)飲(yin)用(yong)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)質(zhi)(zhi)標準(zhun)的(de)(de)(de)制定與人(ren)們(men)的(de)(de)(de)生(sheng)(sheng)(sheng)活(huo)習慣、文化、經濟(ji)條件、科學技術發(fa)展(zhan)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)平、水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)資源及其水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)質(zhi)(zhi)現狀等多(duo)種因(yin)素(su)有關(guan)(guan)，不(bu)(bu)(bu)僅各國之間，而且同一國家的(de)(de)(de)不(bu)(bu)(bu)同地(di)(di)區之間，對飲(yin)用(yong)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)質(zhi)(zhi)的(de)(de)(de)要(yao)求(qiu)(qiu)都(dou)(dou)存在著差異。

工(gong)作原理

多參(can)數(shu)水質(zhi)分析儀主(zhu)要采(cai)用離(li)子選擇電(dian)(dian)(dian)極測(ce)(ce)量法來(lai)實現精(jing)確檢(jian)測(ce)(ce)的(de)。儀器上的(de)電(dian)(dian)(dian)極:PH、氟、鈉、鉀、鈣(gai)、鎂、和參(can)比電(dian)(dian)(dian)極。每(mei)個(ge)電(dian)(dian)(dian)極都有一離(li)子選擇膜(mo)，會與(yu)被測(ce)(ce)樣(yang)(yang)(yang)本(ben)中相應(ying)的(de)離(li)子產生(sheng)反(fan)應(ying)，膜(mo)是一離(li)子交換器，與(yu)離(li)子電(dian)(dian)(dian)荷(he)發(fa)生(sheng)反(fan)應(ying)而改變(bian)了膜(mo)電(dian)(dian)(dian)勢(shi)，就(jiu)可檢(jian)測(ce)(ce)液(ye)，樣(yang)(yang)(yang)本(ben)和膜(mo)間的(de)電(dian)(dian)(dian)勢(shi)。膜(mo)兩(liang)邊(bian)被檢(jian)測(ce)(ce)的(de)兩(liang)個(ge)電(dian)(dian)(dian)勢(shi)差(cha)值會產生(sheng)電(dian)(dian)(dian)流(liu)，樣(yang)(yang)(yang)本(ben)，參(can)考電(dian)(dian)(dian)極，參(can)考電(dian)(dian)(dian)極液(ye)構成"回路"一邊(bian)，膜(mo),內部電(dian)(dian)(dian)極液(ye)，內部電(dian)(dian)(dian)極為另一邊(bian)。

內部(bu)電(dian)極(ji)液和樣本(ben)間(jian)的離(li)子(zi)濃度差會(hui)在工(gong)作電(dian)極(ji)的膜兩(liang)邊產生電(dian)化學(xue)電(dian)壓，電(dian)壓通過(guo)高(gao)傳(chuan)導性的內部(bu)電(dian)極(ji)引(yin)到到放大器，參考(kao)電(dian)極(ji)同樣引(yin)到放大器的地點。通過(guo)檢測一個精確的已(yi)知離(li)子(zi)濃度的標(biao)準(zhun)溶液獲得定標(biao)曲線，從而檢測樣本(ben)中的離(li)子(zi)濃度。

溶液中被測離子接(jie)觸電(dian)(dian)極(ji)(ji)時(shi)，在離子選擇電(dian)(dian)極(ji)(ji)基質的(de)含水層(ceng)內發生離子遷(qian)移。遷(qian)移的(de)離子的(de)電(dian)(dian)荷改變存(cun)在著電(dian)(dian)勢，因而使膜面間的(de)電(dian)(dian)位發生變化，在測量電(dian)(dian)極(ji)(ji)與參比電(dian)(dian)極(ji)(ji)間產生一個電(dian)(dian)位差。

在線多參數水質分析儀cod氨氮總磷總氮檢測

在線多參數水質分析儀cod氨氮總磷總氮檢測