Yang Xinyan, Yi Rongxing, Li Xiangyou, Cui Zhifeng, Lu Yongfeng, Hao Zhongqi, Huang Jingchun, Zhou Zhengxian, Yao Guanxin, Huang Wanxia
Opt Express. 2018 Nov 12;26(23):30456-30465. doi: 10.1364/OE.26.030456.
To improve the quantitative analysis accuracy of an aqueous solution using surface-enhanced laser-induced breakdown spectroscopy (SENLIBS), the filter paper was used as a transmission medium by placing it onto the surface of a metallic substrate to make the microdroplet spreading more uniform in a fixed region of the substrate surface. The trace elements (Cu, Pb, Cd, and Cr) in an aqueous solution were detected successfully using this method. The results showed that the sample preparation repeatability of SENLIBS was noticeably improved with the aid of filter paper. Moreover, the limit of detection (LoD) values was similar to those without filter paper. Furthermore, the R values were improved from 0.61920.9321 to 0.94810.9766, the RMSECV values were decreased from 0.531.95 μg/mL to 0.331.06 μg/mL, and the average relative error (ARE) values were decreased from 8.9622.31% to 4.2814.37% with the aid of filter paper. This demonstrated that the use of filter paper could improve the quantitative analysis accuracy of SENLIBS by increasing the sample preparation repeatability.
为了提高使用表面增强激光诱导击穿光谱法（SENLIBS）对水溶液进行定量分析的准确性，通过将滤纸放置在金属基底表面，将其用作传输介质，以使微滴在基底表面的固定区域内更均匀地扩散。使用该方法成功检测了水溶液中的痕量元素（铜、铅、镉和铬）。结果表明，借助滤纸，SENLIBS的样品制备重复性得到显著提高。此外，检测限（LoD）值与不使用滤纸时相似。此外，相关系数R值从0.61920.9321提高到0.94810.9766，交叉验证均方根误差（RMSECV）值从0.531.95μg/mL降低到0.331.06μg/mL，平均相对误差（ARE）值从8.9622.31%降低到4.2814.37%。这表明使用滤纸可以通过提高样品制备重复性来提高SENLIBS的定量分析准确性。
