本文選題：熒光光度法 + 鹽酸多西環(huán)素　； 參考：《分析試驗(yàn)室》2016年03期

【摘要】：以白糖為碳源,采用一步水熱法合成了發(fā)光碳量子點(diǎn)(CQDs)。用熒光光譜、紫外-可見光譜、紅外光譜對(duì)其發(fā)光特性進(jìn)行了研究,測(cè)定了其熒光壽命。研究了鹽酸多西環(huán)素與該碳量子點(diǎn)的相互作用。實(shí)驗(yàn)表明,在pH 7.96的BR緩沖介質(zhì)中,鹽酸多西環(huán)素對(duì)CQDs熒光強(qiáng)度有明顯的猝滅作用,提出了基于CQDs為探針測(cè)定鹽酸多西環(huán)素的新方法。方法線性范圍為2.0×10~(-7)~3.0×10~(-5)mol/L,相關(guān)系數(shù)r=0.9992,檢出限為1.94×10~(-7)mol/L。該方法用于樣品中鹽酸多西環(huán)素的測(cè)定,回收率為97.2%~99.5%。通過(guò)測(cè)定溫度對(duì)猝滅常數(shù)的影響以及吸收光譜的變化確定了二者的猝滅類型。
[Abstract]:Using white sugar as carbon source, the luminescent carbon quantum dot (CQDsN) was synthesized by one step hydrothermal method. Fluorescence spectra, UV-Vis spectra and infrared spectra were used to study their luminescence characteristics and their fluorescence lifetime was determined. The interaction between doxycycline hydrochloride and the carbon quantum dot was studied. The results show that doxycycline hydrochloride can quench the fluorescence intensity of CQDs in Br buffer medium with pH 7.96. A new method for the determination of doxycycline hydrochloride based on CQDs is proposed. The linear range of the method was 2.0 脳 10 ~ (-10) ~ (-7) mol / L, the correlation coefficient was 0.9992 and the detection limit was 1.94 脳 10 ~ (-1) ~ (-7) mol 路L ~ (-1). The method has been applied to the determination of doxycycline hydrochloride in the sample. The quenching types were determined by determining the effect of temperature on quenching constants and the changes of absorption spectra.
【作者單位】： 延安大學(xué)化學(xué)與化工學(xué)院陜西省反應(yīng)工程重點(diǎn)實(shí)驗(yàn)室;
【基金】：陜西省自然科學(xué)基礎(chǔ)研究計(jì)劃(2014JM2056) 延安大學(xué)研究生科研創(chuàng)新項(xiàng)目資助
【分類號(hào)】：O657.3

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本文編號(hào)：1941982