本文選題：維多利亞藍(lán)B + PFOS��； 參考：《光譜學(xué)與光譜分析》2017年03期

【摘要】：建立了一種用維多利亞藍(lán)B(VBB)簡便、高靈敏、選擇性檢測全氟辛烷磺酸(PFOS)的共振光散射(RLS)分析方法。在pH 6.0的KH_2PO_4-NaOH緩沖體系下,PFOS通過靜電作用與質(zhì)子化的VBB結(jié)合生成離子締合物,在277 nm處的散射信號有明顯的增強(qiáng),增強(qiáng)的散射值(△I_(RLS))與PFOS在一定濃度范圍內(nèi)有良好的線性關(guān)系,其線性方程為△I_(RLS)=72.28+336.53c(r=0.996 4),線性范圍為0.05~4.0μmol·L~(-1),檢測限為5.0 nmol·L~(-1)。優(yōu)化了實(shí)驗(yàn)條件,表征了紫外/可見吸收光譜、掃描電鏡顯微成像(SEM),并探討了作用機(jī)理。在相同實(shí)驗(yàn)條件下,考察了全氟辛酸(PFOA)及其他幾種全氟化合物(PFCs)與VBB的相互作用,未見散射信號變化,因此,本法可實(shí)現(xiàn)對PFOS的選擇性檢測。該方法成功應(yīng)用于檢測環(huán)境水樣中的PFOS,樣品加標(biāo)回收率為91.8%~100.6%,相對標(biāo)準(zhǔn)偏差RSD≤1.74%。
[Abstract]:A simple, highly sensitive and selective method for the determination of perfluorooctane sulfonic acid (PFOS) by VBBB was developed. In the KH2PO4-NaOH buffer system of pH 6.0, PFOS forms ion association complexes by electrostatic interaction with protonated VBB. The scattering signal at 277 nm is obviously enhanced, and the enhanced scattering value (I _ (RLSN) has a good linear relationship with PFOS in a certain concentration range. The linear equation was 72.28 336.53c(r=0.996 _ 4 ~ (-1), the linear range was 0.05 ~ (4) 渭 mol / L ~ (-1) and the detection limit was 5.0 nmol / L ~ (-1). The experimental conditions were optimized, the UV / Vis absorption spectra were characterized, the scanning electron microscopy (SEM) microimaging was performed, and the mechanism of action was discussed. Under the same experimental conditions, the interaction between PFOAA (perfluorooctanoate) and several other perfluorocarboxylic compounds (PFCs) with VBB was investigated, and no change of scattering signal was observed. Therefore, this method can be used to detect PFOS selectively. The method has been successfully applied to the determination of PFOSin environmental water samples. The recoveries of the samples are 91.8% and 100.6, and the relative standard deviation (RSD) is 鈮，

本文編號：1993786