本文選題：氟離子 + 測(cè)定儀器��； 參考：《中國(guó)科學(xué)技術(shù)大學(xué)》2017年碩士論文

【摘要】：隨著世界科技的發(fā)展,工業(yè)化進(jìn)程的加快,人們一邊得到巨大金融利益與擁有工廠的種種產(chǎn)品所提供的日常方便的時(shí)候,對(duì)人們周圍的生活環(huán)境、對(duì)維持人體生存非常重要的飲用水源的污染與影響已經(jīng)達(dá)到非常惡劣的程度。飲用水的氟污染問(wèn)題就是其中之一。統(tǒng)計(jì)數(shù)據(jù)指出,世界兩億以上人口的飲用水含超標(biāo)的氟,并且里面約有8000萬(wàn)中國(guó)人。中國(guó)目前是世界上飲水型氟中毒污染國(guó)家最廣泛和最嚴(yán)重的。實(shí)施并持續(xù)改進(jìn)水里氟離子含量的測(cè)定技術(shù)有非常深遠(yuǎn)的意義。目前,市場(chǎng)上已有的氟檢測(cè)儀器采用的檢測(cè)方法單一、自動(dòng)化程度差,檢測(cè)結(jié)果與專業(yè)水質(zhì)監(jiān)測(cè)站的結(jié)果相對(duì)偏差較大。已有儀器內(nèi)部管路系統(tǒng)無(wú)法解決交叉污染問(wèn)題,此類儀器內(nèi)部大多使用固定的校準(zhǔn)曲線,氟電極檢測(cè)結(jié)果受外界溫度影響較大,而且儀器不能聯(lián)網(wǎng),無(wú)法實(shí)現(xiàn)遠(yuǎn)程控制和水質(zhì)實(shí)時(shí)預(yù)警。本文設(shè)計(jì)研制了一種高精度氟離子自動(dòng)在線檢測(cè)儀器,可以對(duì)飲用水中的氟離子含量進(jìn)行高精度測(cè)定。采用以多聯(lián)體電磁閥為中心的自動(dòng)進(jìn)樣管路和低漂移降噪隔離放大檢測(cè)電路,結(jié)合計(jì)算機(jī)擬合技術(shù),實(shí)現(xiàn)快速、高精度、重復(fù)性好的對(duì)飲用水中氟濃度進(jìn)行測(cè)定。為了保證儀器檢測(cè)有較好的檢測(cè)精度,本工作設(shè)計(jì)了交叉污染少、進(jìn)樣精確的以多聯(lián)體電磁閥為中心的自動(dòng)進(jìn)樣管路。接著設(shè)計(jì)了氟離子選擇性電極的檢測(cè)信號(hào)處理電路,用于提取檢測(cè)過(guò)程中淹沒(méi)在噪聲中的微弱信號(hào)。最后結(jié)合計(jì)算機(jī)基于最小二乘原理的回歸分析技術(shù),對(duì)氟離子選擇性電極的工作曲線進(jìn)行了溫度校正。高精度氟離子自動(dòng)在線檢測(cè)儀器通過(guò)對(duì)實(shí)際水樣的測(cè)定,檢測(cè)結(jié)果具有較高的精度,并且能夠消除溫度等外界因素對(duì)檢測(cè)結(jié)果的影響。
[Abstract]:With the development of science and technology in the world and the acceleration of the industrialization process, people, while enjoying the enormous financial benefits and the daily convenience provided by the various products owned by factories, have a great deal to do with the living environment around them. The pollution and influence of drinking water, which is very important for human survival, has reached a very bad degree. Fluoride pollution in drinking water is one of them. Statistics show that more than 200 million people in the world's drinking water contain excess fluorine, and there are about 80 million Chinese. China is the most widely and seriously polluted country of drinking water fluorosis in the world. It is of great significance to implement and continuously improve the determination technology of fluorine ion content in water. At present, the fluorine detection instruments used in the market have a single detection method and poor automation, and the results are relatively different from the results of the professional water quality monitoring station. The internal piping system of existing instruments can not solve the problem of cross contamination. Most of these instruments use fixed calibration curves. The results of fluorine electrode detection are greatly affected by external temperature, and the instrument cannot be connected to the network. Remote control and real-time water quality warning cannot be realized. In this paper, a high precision fluorine ion automatic on-line detection instrument is designed and developed, which can be used to determine fluorine ion content in drinking water with high precision. The automatic sampling pipeline and low drift noise reduction isolating and amplifying detection circuit are adopted, and computer fitting technology is used to determine fluoride concentration in drinking water quickly, with high precision and reproducibility. In order to ensure that the instrument has better detection accuracy, this work designed the automatic sampling pipeline with less cross pollution and accurate sampling centered on multi-join solenoid valve. Then, the detection signal processing circuit of fluorine ion selective electrode is designed, which is used to extract the weak signal submerged in noise in the detection process. Finally, the temperature correction of the working curve of fluorine ion selective electrode was carried out by using the regression analysis technique based on the least square principle. The high precision fluorine ion automatic on-line detection instrument through the actual water sample determination, the detection result has the high precision, and can eliminate the temperature and other external factors to the detection result influence.
【學(xué)位授予單位】：中國(guó)科學(xué)技術(shù)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TP216

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本文編號(hào)：2048126