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Song Z, Tang W, Chen Z, Wan Z, Chan CLJ, Wang C, Ye W, Fan Z. Temperature-Modulated Selective Detection of Part-per-Trillion NO 2 Using Platinum Nanocluster Sensitized 3D Metal Oxide Nanotube Arrays. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2203212. [PMID: 36058651 DOI: 10.1002/smll.202203212] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Revised: 07/28/2022] [Indexed: 06/15/2023]
Abstract
Semiconductor chemiresistive gas sensors play critical roles in a smart and sustainable city where a safe and healthy environment is the foundation. However, the poor limits of detection and selectivity are the two bottleneck issues limiting their broad applications. Herein, a unique sensor design with a 3D tin oxide (SnO2 ) nanotube array as the sensing layer and platinum (Pt) nanocluster decoration as the catalytic layer, is demonstrated. The Pt/SnO2 sensor significantly enhances the sensitivity and selectivity of NO2 detection by strengthening the adsorption energy and lowering the activation energy toward NO2 . It not only leads to ultrahigh sensitivity to NO2 with a record limit of detection of 107 parts per trillion, but also enables selective NO2 sensing while suppressing the responses to interfering gases. Furthermore, a wireless sensor system integrated with sensors, a microcontroller, and a Bluetooth unit is developed for the practical indoor and on-road NO2 detection applications. The rational design of the sensors and their successful demonstration pave the way for future real-time gas monitoring in smart home and smart city applications.
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Affiliation(s)
- Zhilong Song
- Department of Electronic and Computer Engineering, Energy Institute, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, 999077, China
- The Hong Kong University of Science and Technology-Shenzhen Research Institute, Shenzhen, 518057, China
- Institute for Energy Research, Key Laboratory of Zhenjiang, Jiangsu University, Zhenjiang, Jiangsu, 212013, China
| | - Wenying Tang
- Department of Electronic and Computer Engineering, Energy Institute, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, 999077, China
- The Hong Kong University of Science and Technology-Shenzhen Research Institute, Shenzhen, 518057, China
| | - Zhesi Chen
- Department of Electronic and Computer Engineering, Energy Institute, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, 999077, China
- The Hong Kong University of Science and Technology-Shenzhen Research Institute, Shenzhen, 518057, China
| | - Zhu'an Wan
- Department of Electronic and Computer Engineering, Energy Institute, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, 999077, China
- The Hong Kong University of Science and Technology-Shenzhen Research Institute, Shenzhen, 518057, China
| | - Chak Lam Jonathan Chan
- Department of Electronic and Computer Engineering, Energy Institute, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, 999077, China
- The Hong Kong University of Science and Technology-Shenzhen Research Institute, Shenzhen, 518057, China
| | - Chen Wang
- Department of Electronic and Computer Engineering, Energy Institute, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, 999077, China
- The Hong Kong University of Science and Technology-Shenzhen Research Institute, Shenzhen, 518057, China
| | - Wenhao Ye
- Department of Electronic and Computer Engineering, Energy Institute, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, 999077, China
- The Hong Kong University of Science and Technology-Shenzhen Research Institute, Shenzhen, 518057, China
| | - Zhiyong Fan
- Department of Electronic and Computer Engineering, Energy Institute, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, 999077, China
- The Hong Kong University of Science and Technology-Shenzhen Research Institute, Shenzhen, 518057, China
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2
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Determination of nitric oxide using light-emitting diode-based colorimeter with tubular porous polypropylene membrane cuvette. Anal Bioanal Chem 2021; 413:5301-5307. [PMID: 34212212 DOI: 10.1007/s00216-021-03503-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 06/21/2021] [Accepted: 06/24/2021] [Indexed: 10/21/2022]
Abstract
On the basis of the Griess-Saltzman (GS) reaction, an optical device for nitric oxide (NO) detection in exhaled breath and atmosphere was developed by employing the light-emitting diode (LED, 560 nm) as the light source, light-to-voltage converter (LVC) as the detector, and porous polypropylene membrane tube (PPMT) as the cuvette. The PPMT was filled with GS reagents and covered with a coaxial jacket tube for gas collection and color reaction; two ends of the PPMT were connected with the LED and LVC to detect the change of light transmissivity in the wavelength range of 530 to 590 nm mainly. A gas absorber filled with GS reagents was installed prior to another absorber filled with KMnO4 solution to eliminate the interference of coexisting NO2. Under the optimized experimental conditions, the device achieved a limit of detection (3σ/k) of 4.4 ppbv for NO detection. The linearity range of this device was divided into two segments, i.e., 25 to 100 ppbv and 50 to 1000 ppbv, with both coefficients of determination > 0.99. The relative standard deviation was 2.7% (n = 9, c = 100 ppbv), and the analytical time was 5.5 min per detection. The minimum detectable quantity was decreased to 1.18 ng, which was ~ 100 times lower than the original GS method (115 ng). The present device was applied for determination of NO in exhaled breath, vehicle exhaust, and air. In addition to satisfactory spiking recoveries (i.e., 103% and 107%), the analytical results of the present device were in agreement with the results obtained by the standard method. These results assured the practicality of the developed device for NO detection in real environmental samples.
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Abe K, Shimohira K, Miki Y, Hirose Y, Ohira SI, Toda K. Measurement Device for Ambient Carbonyl Sulfide by Means of Catalytic Reduction Followed by Wet Scrubbing/Fluorescence Detection. ACS OMEGA 2020; 5:25704-25711. [PMID: 33073096 PMCID: PMC7557214 DOI: 10.1021/acsomega.0c02985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/21/2020] [Accepted: 09/17/2020] [Indexed: 06/11/2023]
Abstract
A portable chemical analysis system for monitoring ambient carbonyl sulfide (COS) was investigated for the first time. COS is paid attention to from the perspectives of photosynthesis tracer, breath diagnosis marker, and new process-use in the manufacture of semiconductors. Recently, the threshold level value of COS was settled at 5 ppm in volume ratio (ppmv) for workplace safety management. In this work, COS was converted to H2S by a small column packed with alumina catalyzer at 65 °C. Then, the H2S produced was collected in a small channel scrubber to react with fluorescein mercuric acetate (FMA), and the resulting fluorescence quenching was monitored using an LED/photodiode-based miniature detector. The miniature channel scrubber was re-examined to determine its robustness and easy fabrication, and conditions of the catalyzer were optimized. When the FMA concentration used was 1 μM, the limit of detection and dynamic range, which were both proportional to the FMA concentration, were 0.07 and 25 ppbv, respectively. Ambient COS in the background level and even contaminated COS in the nitrogen gas cylinder could be detected. If necessary, H2S was removed selectively by reproducible adsorbent columns. COS concentrations of engine exhaust were measured by the proposed method and by cryo-trap-gas chromatography-flame photometric detection, and the results obtained (0.5-5.9 ppbv) by the two methods agreed well (R 2 = 0.945, n = 19). COS in ambient air and exhaust gases was successfully measured without any batchwise pretreatment.
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Affiliation(s)
- Kodai Abe
- Department
of Chemistry, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555, Japan
| | - Koki Shimohira
- Department
of Chemistry, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555, Japan
| | - Yusuke Miki
- Tsukuba
Laboratory, Taiyo Nippon Sanso Co., 10 Okubo, Tsukuba, Ibaraki 300-2611, Japan
| | - Yasuo Hirose
- Tsukuba
Laboratory, Taiyo Nippon Sanso Co., 10 Okubo, Tsukuba, Ibaraki 300-2611, Japan
| | - Shin-Ichi Ohira
- Department
of Chemistry, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555, Japan
| | - Kei Toda
- Department
of Chemistry, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555, Japan
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Warden AC, Trowell SC, Gel M. A Miniature Gas Sampling Interface with Open Microfluidic Channels: Characterization of Gas-to-Liquid Extraction Efficiency of Volatile Organic Compounds. MICROMACHINES 2019; 10:mi10070486. [PMID: 31331015 PMCID: PMC6681057 DOI: 10.3390/mi10070486] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 07/15/2019] [Accepted: 07/17/2019] [Indexed: 12/03/2022]
Abstract
Chemosensory protein based olfactory biosensors are expected to play a significant role in next-generation volatile organic compound (VOC) detection systems due to their ultra-high sensitivity and selectivity. As these biosensors can perform most efficiently in aqueous environments, the detection systems need to incorporate a gas sampling interface for gas-to-liquid extraction. This interface should extract the VOCs from the gas phase with high efficiency and transfer them into the liquid containing biosensors to enable subsequent detection. To design such a transfer interface, an understanding of the key parameters influencing the gas-to-liquid extraction efficiency of target VOCs is crucial. This paper reports a gas sampling interface system based on a microfluidic open-channel device for gas-to-liquid extraction. By using this device as a model platform, the key parameters dictating the VOC extraction efficiency were identified. When loaded with 30 μL of capture liquid, the microfluidic device generates a gas-liquid interface area of 3 cm2 without using an interfacial membrane. The pumpless operation based on capillary flow was demonstrated for capture liquid loading and collection. Gas samples spiked with lipophilic model volatiles (hexanal and allyl methyl sulfide) were used for characterization of the VOC extraction efficiency. Decreasing the sampling temperature to 15 °C had a significant impact on increasing capture efficiency, while variation in the gas sampling flow rate had no significant impact in the range between 40–120 mL min−1. This study found more than a 10-fold increase in capture efficiency by chemical modification of the capture liquid with alpha-cyclodextrin. The highest capture efficiency of 30% was demonstrated with gas samples spiked with hexanal to a concentration of 16 ppm (molar proportion). The approach in this study should be useful for further optimisation of miniaturised gas-to-liquid extraction systems and contribute to the design of chemosensory protein-based VOC detection systems.
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Affiliation(s)
| | | | - Murat Gel
- CSIRO Manufacturing, Clayton, VIC 3168, Australia.
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Yanaga A, Hozumi N, Ohira SI, Hasegawa A, Toda K. Formaldehyde vapor produced from hexamethylenetetramine and pesticide: Simultaneous monitoring of formaldehyde and ozone in chamber experiments by flow-based hybrid micro-gas analyzer. Talanta 2016; 148:649-54. [PMID: 26653496 DOI: 10.1016/j.talanta.2015.05.060] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2015] [Revised: 05/19/2015] [Accepted: 05/25/2015] [Indexed: 10/23/2022]
Abstract
Simultaneous analysis of HCHO and O3 was performed by the developed flow analysis system to prove that HCHO vapor is produced from solid pesticide in the presence of O3. HCHO is produced in many ways, including as primary emissions from fuel combustion and in secondary production from anthropogenic and biogenic volatile organic compounds by photochemical reactions. In this work, HCHO production from pesticides was investigated for the first time. Commonly pesticide contains surfactant such as hexamethylenetetramine (HMT), which is a heterocyclic compound formed from six molecules of HCHO and four molecules of NH3. HMT can react with gaseous oxidants such as ozone (O3) to produce HCHO. In the present study, a flow analysis system was developed for simultaneous analysis of HCHO and O3, and this system was used to determine if solid pesticides produced HCHO vapor in the presence of O3. HMT or the pesticide jimandaisen, which contains mancozeb as the active ingradient and HMT as a stabilizer was placed at the bottom of a 20-L stainless steel chamber. Air in the chamber was monitored using the developed flow system. Analyte gases were collected into an absorbing solution by a honeycomb-patterned microchannel scrubber that was previously developed for a micro gas analysis system (μGAS). Subsequently, indigotrisulfonate, a blue dye, was added to the absorbing solution to detect O3, which discolored the solution. HCHO was detected after mixing with the Hantzsch reaction reagent. Both gases could be detected at concentrations ranging from parts per billion by volume (ppbv) to 1000 ppbv with good linearity. Both HMT and jimandaisen emitted large amount of HCHO in the presence of O3.
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Affiliation(s)
- Akira Yanaga
- Department of Chemistry, Kumamoto University, Kumamoto 860-8555, Japan
| | - Naruto Hozumi
- Department of Chemistry, Kumamoto University, Kumamoto 860-8555, Japan
| | - Shin-Ichi Ohira
- Department of Chemistry, Kumamoto University, Kumamoto 860-8555, Japan
| | - Asako Hasegawa
- Department of Architecture and Building Engineering, Kumamoto University, Kumamoto 860-8555, Japan
| | - Kei Toda
- Department of Chemistry, Kumamoto University, Kumamoto 860-8555, Japan.
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6
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Gas analyzer for continuous monitoring of trace level methanethiol by microchannel collection and fluorescence detection. Anal Chim Acta 2014; 841:1-9. [PMID: 25109855 DOI: 10.1016/j.aca.2014.06.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2014] [Revised: 06/09/2014] [Accepted: 06/12/2014] [Indexed: 11/23/2022]
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7
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Macka M, Piasecki T, Dasgupta PK. Light-emitting diodes for analytical chemistry. ANNUAL REVIEW OF ANALYTICAL CHEMISTRY (PALO ALTO, CALIF.) 2014; 7:183-207. [PMID: 24818811 DOI: 10.1146/annurev-anchem-071213-020059] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Light-emitting diodes (LEDs) are playing increasingly important roles in analytical chemistry, from the final analysis stage to photoreactors for analyte conversion to actual fabrication of and incorporation in microdevices for analytical use. The extremely fast turn-on/off rates of LEDs have made possible simple approaches to fluorescence lifetime measurement. Although they are increasingly being used as detectors, their wavelength selectivity as detectors has rarely been exploited. From their first proposed use for absorbance measurement in 1970, LEDs have been used in analytical chemistry in too many ways to make a comprehensive review possible. Hence, we critically review here the more recent literature on their use in optical detection and measurement systems. Cloudy as our crystal ball may be, we express our views on the future applications of LEDs in analytical chemistry: The horizon will certainly become wider as LEDs in the deep UV with sufficient intensity become available.
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Affiliation(s)
- Mirek Macka
- Australian Center for Research on Separation Science and School of Chemistry, University of Tasmania, Hobart, Tasmania 7001, Australia
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8
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Bufaroosha MS, Alnaqbi MA, Al-Marzouqi MH, Marzouk SA. Portable dual-channel gas analyzer for continuous monitoring of carbon dioxide in gas streams. Microchem J 2013. [DOI: 10.1016/j.microc.2013.03.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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9
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Wang Z, Wang C. Is breath acetone a biomarker of diabetes? A historical review on breath acetone measurements. J Breath Res 2013; 7:037109. [DOI: 10.1088/1752-7155/7/3/037109] [Citation(s) in RCA: 164] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Toda K, Ebisu Y, Hirota K, Ohira SI. Membrane-based microchannel device for continuous quantitative extraction of dissolved free sulfide from water and from oil. Anal Chim Acta 2012; 741:38-46. [DOI: 10.1016/j.aca.2012.06.036] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2012] [Revised: 06/16/2012] [Accepted: 06/24/2012] [Indexed: 11/30/2022]
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Toda K, Tokunaga W, Gushiken Y, Hirota K, Nose T, Suda D, Nagai J, Ohira SI. Mobile monitoring along a street canyon and stationary forest air monitoring of formaldehyde by means of a micro-gas analysis system. ACTA ACUST UNITED AC 2012; 14:1462-72. [PMID: 22508343 DOI: 10.1039/c2em10935b] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A micro-gas analysis system (μGAS) was developed for mobile monitoring and continuous measurements of atmospheric HCHO. HCHO gas was trapped into an absorbing/reaction solution continuously using a microchannel scrubber in which the microchannels were patterned in a honeycomb structure to form a wide absorbing area with a thin absorbing solution layer. Fluorescence was monitored after reaction of the collected HCHO with 2,4-pentanedione (PD) in the presence of acetic acid/ammonium acetate. The system was portable, battery-driven, highly sensitive (limit of detection = 0.01 ppbv) and had good time resolution (response time 50 s). The results revealed that the PD chemistry was subject to interference from O(3). The mechanism of this interference was investigated and the problem was addressed by incorporating a wet denuder. Mobile monitoring was performed along traffic roads, and elevated HCHO levels in a street canyon were evident upon mapping of the obtained data. The system was also applied to stationary monitoring in a forest in which HCHO formed naturally via reaction of biogenic compounds with oxidants. Concentrations of a few ppbv-HCHO and several-tens of ppbv of O(3) were then simultaneously monitored with the μGAS in forest air monitoring campaigns. The obtained 1 h average data were compared with those obtained by 1 h impinger collection and offsite GC-MS analysis after derivatization with o-(2,3,4,5,6-pentafluorobenzyl)hydroxylamine (PFBOA). From the obtained data in the forest, daily variations of chemical HCHO production and loss are discussed.
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Affiliation(s)
- Kei Toda
- Department of Chemistry, Kumamoto University, Kurokami 2-39-1, Kumamoto 860-8555, Japan.
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12
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Quantum dot–polymethacrylate composites for the analysis of NOx by fluorescence spectroscopy. Inorganica Chim Acta 2012. [DOI: 10.1016/j.ica.2011.09.052] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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13
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Siervo M, Stephan BCM, Feelisch M, Bluck LJC. Measurement of in vivo nitric oxide synthesis in humans using stable isotopic methods: a systematic review. Free Radic Biol Med 2011; 51:795-804. [PMID: 21672626 DOI: 10.1016/j.freeradbiomed.2011.05.032] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2011] [Revised: 04/22/2011] [Accepted: 05/25/2011] [Indexed: 11/16/2022]
Abstract
Stable isotopic methods are considered the "gold standard" for the measurement of rates of in vivo NO production. However, values reported for healthy human individuals differ by more than 1 order of magnitude. The reason for the apparent variability in NO production is unclear. The primary aim of this review was to evaluate and compare the rates of in vivo NO production in health and disease using stable isotope methods. Articles were retrieved using the PubMed electronic database. Information on concentrations, isotopic enrichments of fluxes, and conversion rates of molecules involved in the NO metabolic pathway was extracted from selected articles; 35 articles were included in the final analysis. Three protocols were identified, including the arginine-citrulline, the arginine-nitrate, and the oxygen-nitrate protocols. The arginine-citrulline protocol showed a wider variability compared to the arginine-nitrate and oxygen-nitrate protocols. The direction of the association between disease state and rate of NO production was essentially determined by the etiopathogenesis of the disorder (inflammatory, metabolic, vascular). Considerable variation in methodologies used to assess whole-body NO synthesis in humans exists. The precision of several aspects of the techniques and the validity of some assumptions made remain unknown, and there is a paucity of information about physiological rates of NO production from childhood over adolescence to old age.
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Affiliation(s)
- M Siervo
- Elsie Widdowson Laboratory, MRC Human Nutrition Research, Cambridge CB1 9NL, UK.
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Toda K, Kuwahara H, Ohira SI. On-site measurement of trace-level sulfide in natural waters by vapor generation and microchannel collection. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2011; 45:5622-5628. [PMID: 21671649 DOI: 10.1021/es2006226] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Aqueous sulfide plays an important role in the environment even at low concentrations. However, it is unstable, which means field samples cannot be transported to the laboratory for analysis without fixation. In this work, a novel method was developed to determine trace levels of sulfide on site. This method is based on vapor generation and collection in a special microchannel device followed by fluorescence measurement (VG-μGAS). The microchannel scrubber gave a high enrichment factor, and a high sensitivity was achieved, which allowed measurement of nanomolar (nM) levels of sulfide. The theoretical approach to vapor generation for several compounds is discussed to evaluate the applicability of the method to these analytes, and compounds having a low Henry's law constant (<1 M atm(-1)) are suitable to measure by VG-μGAS. Under optimized conditions, concentrations of 1.0-100 nM of sulfide could be measured. The sulfide contents of hot spring, aquarium, pond, and seawater were successfully measured by this method. Nanomolar levels of sulfide could be measured on site without loss of analyte, and results were obtained instantly in the field, both of which are advantageous for effective field surveys. The method was also applied to field measurements of aqueous sulfide in the Ariake Sea and Lake Baikal.
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Affiliation(s)
- Kei Toda
- Department of Chemistry, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555, Japan.
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TODA K, HIROTA K, TOKUNAGA W, SUDA D, GUSHIKEN Y, OHIRA SI. On-site Multi Monitoring of Isoprene and Related Compounds in Forest Air. BUNSEKI KAGAKU 2011. [DOI: 10.2116/bunsekikagaku.60.489] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Kei TODA
- Department of Chemistry, Kumamoto University
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16
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Ribeiro JPN, Magalhães LM, Segundo MA, Reis S, Lima JLFC. Fully automatic flow method for the determination of scavenging capacity against nitric oxide radicals. Anal Bioanal Chem 2010; 397:3005-14. [DOI: 10.1007/s00216-010-3883-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2010] [Revised: 05/26/2010] [Accepted: 05/26/2010] [Indexed: 12/20/2022]
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17
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Arora A, Simone G, Salieb-Beugelaar GB, Kim JT, Manz A. Latest Developments in Micro Total Analysis Systems. Anal Chem 2010; 82:4830-47. [PMID: 20462185 DOI: 10.1021/ac100969k] [Citation(s) in RCA: 372] [Impact Index Per Article: 26.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Arun Arora
- KIST Europe, Korea Institute of Science and Technology, Campus E71, 66123 Saarbrücken, Germany, FRIAS, Freiburg Institute for Advanced Studies, Albert-Ludwigs-Universität Freiburg, Albertstrasse 19, 79104 Freiburg, Germany, IMTEK, Institute for Microsystem Technology, University of Freiburg, Georges-Köhler-Allee 103, 79110 Freiburg, Germany, and MESA+ Institute for Nanotechnology/Lab-on-a-Chip Group, Twente University, Building Carré, 7500 AE, Enschede, The Netherlands
| | - Giuseppina Simone
- KIST Europe, Korea Institute of Science and Technology, Campus E71, 66123 Saarbrücken, Germany, FRIAS, Freiburg Institute for Advanced Studies, Albert-Ludwigs-Universität Freiburg, Albertstrasse 19, 79104 Freiburg, Germany, IMTEK, Institute for Microsystem Technology, University of Freiburg, Georges-Köhler-Allee 103, 79110 Freiburg, Germany, and MESA+ Institute for Nanotechnology/Lab-on-a-Chip Group, Twente University, Building Carré, 7500 AE, Enschede, The Netherlands
| | - Georgette B. Salieb-Beugelaar
- KIST Europe, Korea Institute of Science and Technology, Campus E71, 66123 Saarbrücken, Germany, FRIAS, Freiburg Institute for Advanced Studies, Albert-Ludwigs-Universität Freiburg, Albertstrasse 19, 79104 Freiburg, Germany, IMTEK, Institute for Microsystem Technology, University of Freiburg, Georges-Köhler-Allee 103, 79110 Freiburg, Germany, and MESA+ Institute for Nanotechnology/Lab-on-a-Chip Group, Twente University, Building Carré, 7500 AE, Enschede, The Netherlands
| | - Jung Tae Kim
- KIST Europe, Korea Institute of Science and Technology, Campus E71, 66123 Saarbrücken, Germany, FRIAS, Freiburg Institute for Advanced Studies, Albert-Ludwigs-Universität Freiburg, Albertstrasse 19, 79104 Freiburg, Germany, IMTEK, Institute for Microsystem Technology, University of Freiburg, Georges-Köhler-Allee 103, 79110 Freiburg, Germany, and MESA+ Institute for Nanotechnology/Lab-on-a-Chip Group, Twente University, Building Carré, 7500 AE, Enschede, The Netherlands
| | - Andreas Manz
- KIST Europe, Korea Institute of Science and Technology, Campus E71, 66123 Saarbrücken, Germany, FRIAS, Freiburg Institute for Advanced Studies, Albert-Ludwigs-Universität Freiburg, Albertstrasse 19, 79104 Freiburg, Germany, IMTEK, Institute for Microsystem Technology, University of Freiburg, Georges-Köhler-Allee 103, 79110 Freiburg, Germany, and MESA+ Institute for Nanotechnology/Lab-on-a-Chip Group, Twente University, Building Carré, 7500 AE, Enschede, The Netherlands
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