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Low-cost and convenient ballpoint tip-protected liquid-phase microextraction for sensitive analysis of organic molecules in water samples
Analytica Chimica Acta ( IF 6.2 ) Pub Date : 2018-05-01 , DOI: 10.1016/j.aca.2017.12.037
Baocheng Ji , Bing Xia , Xian Fu , Shan Lei , Ye Ye , Yan Zhou

Simplification and miniaturization in analytical procedures are highly preferred by analysts and other researchers. In this study, a low-cost, convenient and efficient liquid-phase microextraction method, termed ballpoint tip-protected liquid-phase microextraction (BT-LPME), was established. The bullet-shaped BT possessed a hollow cavity of several microliters for solvent storage and an opening tail for solute extraction. Magnetic field-induced BT spinning significantly accelerated the extraction process. By virtue of the adhesion between a stainless steel sheath and an organic solvent, along with cave protection, finely stable storage of extractant was achieved even under high spinning speeds (>1000 rpm). The BT-LPME performance was evaluated by extracting five polycyclic aromatic hydrocarbons (PAHs) from aqueous solution, followed by gas chromatography-mass spectrometry (GCMS) analysis. Compared to static single drop microextraction (SDME), the BT-LPME method provided higher enrichments (128-173-fold) for the five PAHs. Good linearities (from 0.01∼0.05 μg L-1 to 50 μg L-1) with a regression coefficient (r2) ≥0.9993, as well as low limits of detection (LODs, 0.002-0.011 μg L-1) and limits of quantification (LOQs, 0.007-0.023 μg L-1), were obtained. Relative recoveries varied from 92.3% to 103.4% at three spiked levels of 0.1, 1 and 10 μg L-1. The BT-LPME technique was also successfully applied to the enrichment of other organic compounds, such as organophosphorus compounds, organochlorines and triazines.

中文翻译:

低成本、方便的圆珠笔尖保护液相微萃取,用于对水样中的有机分子进行灵敏分析

分析人员和其他研究人员非常喜欢分析程序的简化和小型化。本研究建立了一种低成本、方便、高效的液相微萃取方法,称为圆珠笔尖保护液相微萃取(BT-LPME)。子弹形 BT 拥有一个数微升的空腔用于储存溶剂,还有一个用于提取溶质的开口尾部。磁场诱导的 BT 旋转显着加速了提取过程。凭借不锈钢护套和有机溶剂之间的粘附力以及洞穴保护,即使在高转速 (>1000 rpm) 下也能实现萃取剂的精细稳定储存。通过从水溶液中提取五种多环芳烃 (PAH) 来评估 BT-LPME 性能,随后进行气相色谱-质谱 (GCMS) 分析。与静态单滴微萃取 (SDME) 相比,BT-LPME 方法为五种多环芳烃提供了更高的富集(128-173 倍)。良好的线性(从 0.01∼0.05 μg L-1 到 50 μg L-1),回归系数 (r2) ≥ 0.9993,以及低检测限(LOD,0.002-0.011 μg L-1)和定量限(LOQ,0.007-0.023 μg L-1)。在 0.1、1 和 10 μg L-1 三个加标水平下,相对回收率从 92.3% 到 103.4% 不等。BT-LPME 技术还成功应用于其他有机化合物的富集,如有机磷化合物、有机氯和三嗪。BT-LPME 方法为五种多环芳烃提供了更高的富集(128-173 倍)。良好的线性(从 0.01∼0.05 μg L-1 到 50 μg L-1),回归系数 (r2) ≥ 0.9993,以及低检测限(LOD,0.002-0.011 μg L-1)和定量限(LOQ,0.007-0.023 μg L-1)。在 0.1、1 和 10 μg L-1 三个加标水平下,相对回收率从 92.3% 到 103.4% 不等。BT-LPME 技术还成功应用于其他有机化合物的富集,如有机磷化合物、有机氯和三嗪。BT-LPME 方法为五种多环芳烃提供了更高的富集(128-173 倍)。良好的线性(从 0.01∼0.05 μg L-1 到 50 μg L-1),回归系数 (r2) ≥ 0.9993,以及低检测限(LOD,0.002-0.011 μg L-1)和定量限(LOQ,0.007-0.023 μg L-1)。在 0.1、1 和 10 μg L-1 三个加标水平下,相对回收率从 92.3% 到 103.4% 不等。BT-LPME 技术还成功应用于其他有机化合物的富集,如有机磷化合物、有机氯和三嗪。在 0.1、1 和 10 μg L-1 三个加标水平下为 3% 至 103.4%。BT-LPME 技术还成功应用于其他有机化合物的富集,如有机磷化合物、有机氯和三嗪。在 0.1、1 和 10 μg L-1 三个加标水平下为 3% 至 103.4%。BT-LPME 技术还成功应用于其他有机化合物的富集,如有机磷化合物、有机氯和三嗪。
更新日期:2018-05-01
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