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Somboot W, Awiphan S, Jakmunee J, Prapamontol T, Kanyanee T. Rapid fluorometric determination of ammonium in exhaled breath condensate based on digital image of a windowless falling drop cell via a low-cost digital microscope. TALANTA OPEN 2023. [DOI: 10.1016/j.talo.2023.100208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2023] Open
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Soap film as a rapidly renewable and low-cost sensor for detecting ammonia in water and saliva. Microchem J 2022. [DOI: 10.1016/j.microc.2022.108209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Lv X, Liao L, Chen S, Xiao Y, Jiang Z, Wen G. A cholesterol benzoate RRS probe for the determination of trace ammonium ions. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 272:120945. [PMID: 35151166 DOI: 10.1016/j.saa.2022.120945] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 01/19/2022] [Accepted: 01/20/2022] [Indexed: 06/14/2023]
Abstract
The measurement of NH4+ has attracted considerable attention with the increase of NH4+ emissions in sewage caused by human activities. So far, a variety of photometric and fluorescence methods for the detection of NH4+ have been researched and summarized, but there is no report about the use of liquid crystals (LCs) cholesteryl benzoate (CB) as a resonance Rayleigh scattering (RRS) probe to determine ammonium ions. In the NaAc-HAc buffer solution with pH = 4.80, the yellow compounds 3,5 diacetyl-1,4 dihydrolutidine (DDL) generated by the reaction of NH4+ with acetylacetone (AT) and formaldehyde (HCHO) act as the energy receiver and CB as the donor. Because the RRS spectrum of CB overlaps with the DDL absorption spectrum, resonance Rayleigh scattering energy transfer (RRS-ET) occurs. When the NH4+ concentration increased, the generated DDL increased, and the RRS-ET also increased, so the RRS intensity of the system at 395 nm decreased. For this reason, a fast and sensitive CB RRS-ET method was established to apply to the detection of NH4+ in water. The detection range was 1.00 × 10-3 - 4.66 μg/mL, and the detection limit was 6.62 × 10-3 μg/mL. Using this method to analyze and detect NH4+ in environmental water samples, the precision and recovery rate were between 1.30-9.30% and 95.5-109.9%, respectively. Therefore, this method has the advantages of sensitivity and simplicity.
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Affiliation(s)
- Xiaowen Lv
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin 541004, China; Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology for Science and Education Combined with Science and Technology Innovation Base, Guilin 541004, China
| | - Liping Liao
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin 541004, China; Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology for Science and Education Combined with Science and Technology Innovation Base, Guilin 541004, China
| | - Shuxin Chen
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin 541004, China; Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology for Science and Education Combined with Science and Technology Innovation Base, Guilin 541004, China
| | - Yang Xiao
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin 541004, China; Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology for Science and Education Combined with Science and Technology Innovation Base, Guilin 541004, China
| | - Zhiliang Jiang
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin 541004, China; Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology for Science and Education Combined with Science and Technology Innovation Base, Guilin 541004, China
| | - Guiqing Wen
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin 541004, China; Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology for Science and Education Combined with Science and Technology Innovation Base, Guilin 541004, China.
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Jiang Y, Dong X, Li Y, Li Y, Liang Y, Zhang M. An environmentally-benign flow-batch system for headspace single-drop microextraction and on-drop conductometric detecting ammonium. Talanta 2021; 224:121849. [PMID: 33379065 DOI: 10.1016/j.talanta.2020.121849] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2020] [Revised: 10/26/2020] [Accepted: 10/28/2020] [Indexed: 11/16/2022]
Abstract
This work presents a lab-made automatic flow-batch system for headspace single-drop microextraction and on-drop conductometric sensing ammonium. Sample and NaOH solution are simultaneously pumped into a reaction chamber (RC), where ammonium is converted to ammonia by raising pH. The converted ammonia then diffuses into the headspace of the RC, and reacts with a 100 mM boric acid drop. The conductivity of the drop is measured by an on-drop conductivity probe, which is made by two stainless-steel contacting electrodes. The result shows that the increasing rate of conductivity has a linear relationship to the ammonium concentration in sample (R2 = 0.9945). This method has a linear range up to 400 μM, a limit of detection 2.8 μM, a relative standard deviation of 3.0% (200 μM, n = 10) and carryover coefficient 0.028. Measurements of river waters, lake waters and wastewaters have been demonstrated. The recoveries have achieved from 99.0 to 114%. This method avoids using of harmful or odorous reagents and follows the concept of green chemistry.
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Affiliation(s)
- Yongrong Jiang
- School of Life and Environmental Sciences, Guangxi Key Laboratory of Automatic Detecting Technology and Instruments, Guilin University of Electronic Technology, Guilin, Guangxi, 541004, China
| | - Xuezhi Dong
- School of Life and Environmental Sciences, Guangxi Key Laboratory of Automatic Detecting Technology and Instruments, Guilin University of Electronic Technology, Guilin, Guangxi, 541004, China
| | - Yuzhe Li
- School of Life and Environmental Sciences, Guangxi Key Laboratory of Automatic Detecting Technology and Instruments, Guilin University of Electronic Technology, Guilin, Guangxi, 541004, China
| | - Yan Li
- School of Life and Environmental Sciences, Guangxi Key Laboratory of Automatic Detecting Technology and Instruments, Guilin University of Electronic Technology, Guilin, Guangxi, 541004, China
| | - Ying Liang
- School of Life and Environmental Sciences, Guangxi Key Laboratory of Automatic Detecting Technology and Instruments, Guilin University of Electronic Technology, Guilin, Guangxi, 541004, China.
| | - Min Zhang
- School of Life and Environmental Sciences, Guangxi Key Laboratory of Automatic Detecting Technology and Instruments, Guilin University of Electronic Technology, Guilin, Guangxi, 541004, China.
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Somboot W, Jakmunee J, Kanyanee T. Environmentally friendly liquid medium for a cost-effective long-path absorption liquid core waveguide with a gas diffusion flow analysis system. Microchem J 2020. [DOI: 10.1016/j.microc.2020.105555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Khongrangdee T, Somboot W, Jakmunee J, Kanyanee T. Colorimetric Determination of Sulfide in Turbid Water with a Cost-effective Flow-batch Porous Membrane-based Diffusion Scrubber System. ANAL SCI 2020; 36:1353-1358. [PMID: 32624522 DOI: 10.2116/analsci.20p158] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A cost-effective flow-batch analysis approach with colorimetric measurement has been developed for sulfide ion determination in turbid water samples without using a conventional pump and valve. Under an acidic condition, sulfide ion was converted to hydrogen sulfide gas and liberated out from other complicated matrices. The porous membrane-based diffusion scrubber was utilized as a gas trapping unit for hydrogen sulfide gas separation/preconcentration. From the correlation of sulfide ion concentration and disappearance of sodium nitroprusside reagent detection by using a homemade LED-photodiode based colorimetry, a linear relationship of sulfide ion concentration and absorbance can be obtained with relative standard deviation (%RSD) less than 5%. The limit of detection was 5.6 μmol L-1. The proposed system was applied for sulfide ion determination in wastewater samples with the recoveries of 91.0 - 105.2%. The proposed system is a robust setup and able to handle turbid water samples without a sample filtering step.
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Affiliation(s)
- Thatsanee Khongrangdee
- Department of Chemistry, Faculty of Science, Chiang Mai University.,The Graduate School, Chiang Mai University
| | - Wasin Somboot
- Department of Chemistry, Faculty of Science, Chiang Mai University.,The Graduate School, Chiang Mai University
| | - Jaroon Jakmunee
- Department of Chemistry, Faculty of Science, Chiang Mai University.,Center of Excellence for Innovation in Chemistry, Chiang Mai University.,Research Center on Chemistry for Development of Health Promoting Products from Northern Resources, Chiang Mai University
| | - Tinakorn Kanyanee
- Department of Chemistry, Faculty of Science, Chiang Mai University.,Center of Excellence for Innovation in Chemistry, Chiang Mai University.,Research Center on Chemistry for Development of Health Promoting Products from Northern Resources, Chiang Mai University
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Ngamakarn K, Pungwiwat N, Wangkarn S, Grudpan K, Kanyanee T. Liquid handling employing a moving drop for electrokinetic sample introduction system for capillary zone electrophoresis. Talanta 2020; 218:121118. [PMID: 32797876 DOI: 10.1016/j.talanta.2020.121118] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 05/01/2020] [Accepted: 05/02/2020] [Indexed: 12/16/2022]
Abstract
A simple cost-effective moving drop device, with solenoid valves control for programmable liquid handling, was developed for electrokinetic injection in capillary zone electrophoresis (CZE). With a CZE of 50-μm bore fused silica capillary tube and contactless conductivity detector (C4D), mixed anions (Cl-, NO3-, and SO42- as the model) solution was injected at the ground side. Simultaneous quantitative chemical analysis can be achieved. A linear relationship of concentration and the peak height was achieved in the range of 0.5-10 mg L-1 for each anion, with LOD and LOQ being 0.02 mg L-1 and 0.5 mg L-1, respectively. The MVD-CZE system allows continuous operation with a sample throughput of 40 samples/hour. A real sample application was demonstrated for air samples, with one drop (25 μL) collected from a midget bubbler based air sampling unit. The recoveries were found to be 74.4-115.0 %. The developed device was also preliminarily applied for the injection of mixed cations (NH4+, Na+, K+, Ca2+, and Mg2+) at the high voltage side end with optimistic results.
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Affiliation(s)
- Kunchuma Ngamakarn
- Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand; The Graduate School, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Narongporn Pungwiwat
- Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Sunanta Wangkarn
- Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Kate Grudpan
- Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand; Center of Excellence for Innovation in Analytical Science and Technology, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Tinakorn Kanyanee
- Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand; Center of Excellence for Innovation in Analytical Science and Technology, Chiang Mai University, Chiang Mai, 50200, Thailand.
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Somboot W, Jakmunee J, Kanyanee T. An exploiting of cost-effective direct current conductivity detector in gas diffusion flow injection system. Talanta 2017; 170:298-305. [PMID: 28501173 DOI: 10.1016/j.talanta.2017.04.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Accepted: 04/07/2017] [Indexed: 11/25/2022]
Abstract
In this work, a homemade direct current (DC) conductivity detector as an alternative cost-effective detection device has been fabricated and investigated to use in flow analysis system. Under the selected appropriate conditions of flow system, the electrolysis of a carrier stream at the conductivity detector was negligible and provides well-defined signal. The cost-effective DC conductivity detector was demonstrated to couple with gas diffusion flow injection system for determination of dissolved inorganic carbon (DIC) in water. The method is based on the conversion of DIC (dissolved CO2, HCO3- and CO32-) presented in the injected sample to carbon dioxide in an acidic donor stream and then CO2 gas diffuses through a hydrophobic porous membrane to an acceptor stream. As a result, the change of conductivity signal was observed corresponding to DIC concentration. A linear calibration range of DIC in 1.0-10mmolL-1, with limit of detection of 70µmolL-1, repeatability of <3% RSD and 15 injections h-1 sample throughput can be obtained. This method was applied for DIC determination in natural water.
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Affiliation(s)
- Wasin Somboot
- Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Jaroon Jakmunee
- Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand; Center of Excellence for Innovation in Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Tinakorn Kanyanee
- Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand; Center of Excellence for Innovation in Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand.
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Kim BC, Yamamoto T, Kim YH. In-Line Measurement of Water Contents in Ethanol Using a Zeolite-Coated Quartz Crystal Microbalance. SENSORS 2015; 15:27273-82. [PMID: 26516859 PMCID: PMC4634433 DOI: 10.3390/s151027273] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/05/2015] [Revised: 10/22/2015] [Accepted: 10/23/2015] [Indexed: 11/16/2022]
Abstract
A quartz crystal microbalance (QCM) was utilized to measure the water content in ethanol. For the improvement of measurement sensitivity, the QCM was modified by applying zeolite particles on the surface with poly(methyl methacrylate) (PMMA) binder. The measurement performance was examined with ethanol of 1% to 5% water content in circulation. The experimental results showed that the frequency drop of the QCM was related with the water content though there was some deviation. The sensitivity of the zeolite-coated QCM was sufficient to be implemented in water content determination, and a higher ratio of silicon to aluminum in the molecular structure of the zeolite gave better performance. The coated surface was inspected by microscopy to show the distribution of zeolite particles and PMMA spread.
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Affiliation(s)
- Byoung Chul Kim
- Department of Advanced Materials and Chemical Engineering, Kyungnam College of Information & Technology, Pusan 617-701, Korea.
| | - Takuji Yamamoto
- Department of Chemical Engineering, University of Hyogo, Himeji 671-2201, Japan.
| | - Young Han Kim
- Department of Chemical Engineering, Dong-A University, Pusan 604-714, Korea.
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