本文選題：熒光　切入點(diǎn)：柴油　出處：《中國(guó)測(cè)試》2017年12期

【摘要】：針對(duì)濃度熒光測(cè)量時(shí)峰值法和積分法的選擇問(wèn)題,在理論和實(shí)驗(yàn)兩方面對(duì)兩種方法進(jìn)行比較。首先理論分析峰值法和積分法的濃度測(cè)量原理;其次利用FS920型穩(wěn)態(tài)熒光光譜儀掃描純水、柴油與其混合液樣品的三維熒光光譜,根據(jù)最強(qiáng)熒光峰確定樣品的最佳激發(fā)波長(zhǎng)為290 nm;再次根據(jù)最佳激發(fā)波長(zhǎng)掃描濃度較低的5種樣品的二維熒光光譜,由平均光譜確定主峰和肩峰波長(zhǎng)分別為360 nm和326 nm;然后分析比較主峰和肩峰中心擴(kuò)展區(qū)間和區(qū)域內(nèi)積分熒光法校正模型參數(shù)的變化規(guī)律;最后,通過(guò)留一法交叉驗(yàn)證7種不同方法所建濃度校正模型的精度并進(jìn)行比較。實(shí)驗(yàn)結(jié)果表明:在低濃度下,峰值和積分熒光強(qiáng)度與濃度之間都具有良好的線性關(guān)系,相關(guān)系數(shù)r0.99,與理論相符;相關(guān)系數(shù)和校正決定系數(shù)隨積分范圍的增大先增大后減小,在峰值附近2~10 nm范圍內(nèi)存在極值;就積分熒光濃度模型本身而言,主峰優(yōu)于肩峰,模型靈敏度、模型誤差與殘差平方和隨積分范圍的增大而增大;在濃度配置誤差范圍內(nèi),峰值法和積分法濃度測(cè)量絕對(duì)誤差的平均值均在0.002‰以內(nèi)。
[Abstract]:Aiming at the problem of peak selection method and integral method the concentration of fluorescence measurement, in two aspects of theory and experiment of the two methods were compared. The first principle theory analysis of peak concentration measurement method and integral method; then using the FS920 steady-state fluorescence spectrometer scanning with pure water, diesel mixed liquid samples according to the three-dimensional fluorescence spectra, the strongest fluorescence the peak were determined the optimal excitation wavelength is 290 nm; again according to the two-dimensional fluorescence spectra of 5 samples of the best excitation wavelength scanning low concentration, and determined by the average spectral peak peak wavelength were 360 nm and 326 nm; and then analyzes the change rule is the highest peak and center region and acromion extended interval integral fluorescence correction model finally, through the parameter; leave one cross validation of 7 different methods for the concentration correction precision of the model were compared. The experimental results show that under the condition of low concentration peak Have a good linear relationship between the fluorescence intensity and concentration and integral, correlation coefficient r0.99, consistent with the theory; increase the correlation coefficient and the correction coefficient of determination with integral range increases first and then decreases, the existence of extrema in the peak near 2~10 in the range of nm; on the integral fluorescence concentration model is better than the peak itself, acromion, model sensitivity. Increase of model error and residual sum of squares with integral range increases; when the concentration of configuration error range, peak method and integral method for measuring the concentration of the mean absolute error was less than 0.002 per thousand.

【作者單位】： 燕山大學(xué)理學(xué)院;燕山大學(xué)里仁學(xué)院;
【基金】：國(guó)家自然科學(xué)基金青年科學(xué)基金(11504320)
【分類(lèi)號(hào)】：O657.3;X832

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本文編號(hào)：1697104