Kurrey Ramsingh, Deb Manas Kanti, Shrivas Kamlesh, Nirmalkar Jayant, Sen Bhupendra Kumar, Mahilang Mithlesh, Jain Vikas Kumar
School of Studies in Chemistry, Pt. Ravishankar Shukla University Raipur-492 010 Chhattisgarh India
Korea Research Institute of Standards and Science Yuseong, District Daejeon South Korea.
RSC Adv. 2020 Nov 7;10(66):40428-40441. doi: 10.1039/d0ra07286a. eCollection 2020 Nov 2.
Herein, we report a KBr-impregnated paper substrate as a sample probe to enhance the attenuated total reflection-Fourier transform infrared (ATR-FTIR) signal strength of anionic surfactants (AS) and non-ionic surfactants (NS) in an aqueous solution. The mechanism for the sensing of AS and NS is based on the strong interaction of surfactants with the silicate groups (SiO ) of the KBr-impregnated paper substrate. The role of SiO on the surface of the paper is to enhance the adsorption of AS and NS, resulting in improved IR signal intensities for the target analytes. The improved signal intensity at 1253 cm (SO , symmetric stretching) for AS and 1114 cm (C-O-C, stretching vibration) for NS were selected for quantification. SEM-EDX was employed to determine the elemental compositions of pre- and post-adsorbed AS and NS on glass fibre filter paper (GFF). The linear range for the determination of AS and NS was 10-100 μg L with a method detection limit (MDL) of 4 μg L and method quantification limit (MQL) of 12 μg L. The good relative recovery of 71.4-109.7% and the interference studies showed the selectivity of the method for the determination of AS and NS in environmental water and commodity samples. The advantages of this method include its cost-effectiveness, enhanced sensitivity, disposability and accessibility of the paper substrate.
在此，我们报道了一种溴化钾浸渍纸基质作为样品探针，以增强水溶液中阴离子表面活性剂（AS）和非离子表面活性剂（NS）的衰减全反射-傅里叶变换红外（ATR-FTIR）信号强度。AS和NS的传感机制基于表面活性剂与溴化钾浸渍纸基质的硅酸盐基团（SiO）之间的强相互作用。纸表面SiO的作用是增强AS和NS的吸附，从而提高目标分析物的红外信号强度。选择AS在1253 cm（SO，对称伸缩）处和NS在1114 cm（C-O-C，伸缩振动）处改善后的信号强度进行定量分析。采用扫描电子显微镜-能量色散X射线光谱（SEM-EDX）测定玻璃纤维滤纸（GFF）上吸附AS和NS前后的元素组成。AS和NS的测定线性范围为10-100 μg L，方法检出限（MDL）为4 μg L，方法定量限（MQL）为12 μg L。71.4-109.7%的良好相对回收率以及干扰研究表明了该方法对环境水和商品样品中AS和NS测定的选择性。该方法的优点包括成本效益高、灵敏度增强、纸基质可一次性使用且易于获取。
