期刊
MICROCHEMICAL JOURNAL
卷 159, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.microc.2020.105555
关键词
Liquid core waveguide; Long-path absorption spectrophotometry; Gas diffusion flow injection; Green chemical analysis; Ammonium determination; Environmentally friendly
资金
- Research Center on Chemistry for Development of Health Promoting Products from Northern Resources-Chiang Mai University
- International Foundation for Science (IFS) [W-5094-1]
- Center of Excellence for Innovation in Chemistry (PERCH-CIC)
- Thailand Research Fund (TRF) [DPG6080002]
- National Research Council of Thailand (NRCT)
An environmentally friendly modified flow analysis carrier with a high refractive index liquid to perform a total internal refrection phenomenon in a typical Teflon tube was achieved as a cost-effective long-path liquid core waveguide (LCW) for absorption spectrophotometry. A home-built LED-photodiode based long-path colorimeter was demonstrated to enhance the sensitivity of chemical analysis without using a preconcentration unit. A low toxicity carrier such as syrup or ethanol was selected to improve the sensitivity for NH4+ ion determination via butterfly pea flower extract reagent in a gas-diffusion flow injection (GD-FI) system. A linear calibration range of NH4+ ion determination in the GD-FI based on syrup modified LCW (mLCW) system of 10-500 mu mol L-1 can be obtained with a detection limit of 9.8 mu mol L-1, repeatability of <2% RSD, and 12 injections h(-1) sample throughput. The proposed cost-effective and environmentally friendly mLCW shows the potential to apply with other natural/synthetic chromogenic reagents for the green chemical analysis approach.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据