Membraneless vaporization unit for direct analysis of solid sample

Sereenonchai, Kamonthip; Saetear, Phoonthawee; Amornthammarong, Natchanon; Uraisin, Kanchana; Wilairat, Prapin; Motomizu, Shoji; Nacapricha, Duangjai

doi:10.1016/j.aca.2007.06.036

Cited by 22 publications

(10 citation statements)

References 14 publications

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“…If a scheme can be devised that will permit continuous flow of both donor and acceptor streams without contact but in close vapor phase communication (in principle, much the same as a flow-through Conway cell) then the need for the membrane in the pervaporation arrangement will be obviated. Both Choengchan et al [40] and Mornane et al [41] independently accomplished this; the former group has since carried out other work on such “membraneless” vaporization or gas diffusion [42–45]. …”

Section: Resultsmentioning

confidence: 99%

A disposable blood cyanide sensor

Tian

Dasgupta

Mahon

et al. 2013

Analytica Chimica Acta

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Deaths due to smoke inhalation in fires are often due to poisoning by HCN. Rapid administration of antidotes can result in complete resuscitation of the patient but judicious dosing requires the knowledge of the level of cyanide exposure. Rapid sensitive means for blood cyanide quantitation are needed. Hydroxocyanocobinamide (OH(CN)Cbi) reacts with cyanide rapidly; this is accompanied by a large spectral change. The disposable device consists of a pair of nested petri dish bottoms and a single top that fits the outer bottom dish. The top cover has a diametrically strung porous polypropylene membrane tube filled with aqueous OH(CN)Cbi. One end of the tube terminates in an amber (583 nm) light emitting diode; the other end in a photodiode via an acrylic optical fiber. An aliquot of the blood sample is put in the inner dish, the assembly covered and acid is added through a port in the cover. Evolved HCN diffuses into the OH(CN)Cbi solution and the absorbance in the long path porous membrane tube cell is measured within 160s. The LOD was 0.047, 1.0, 0.15, 5.0 and 2.2 μM, respectively, for water (1 mL), bovine blood (100 μL, 1 mL), and rabbit blood (20μL, 50 μL). RSDs were < 10% in all cases and the linear range extended from 0.5 to 200 μM. The method was validated against a microdiffusion approach and applied to the measurement of cyanide in rabbit and human blood. The disposable device permits field measurement of blood cyanide in < 4 min.

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Section: Resultsmentioning

confidence: 99%

A disposable blood cyanide sensor

Tian

Dasgupta

Mahon

et al. 2013

Analytica Chimica Acta

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“…A membraneless setup avoids membrane fouling problems [17,18]. The flow analysis coupled with membraneless format has been developed [17][18][19]. Air segmentation in such systems can have advantages [20]; this has been applied to ethanol determination [21].…”

Section: Introductionmentioning

confidence: 99%

Conductometric determination of ammonium ion with a mobile drop

Jaikang

Grudpan

Kanyanee

2015

Talanta

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“…Thus, sample throughputs are up to 60 samples per hour [1,[11][12][13]. Almost all kinds of detection can be coupled to the above flow-based techniques, including UV-Vis absorbance [14][15][16][17][18][19][20][21][22], fluorescence [22][23][24], chemiluminescence [25,26], electrochemical detections (amperometry) [27][28][29][30], conductivity [31] and contactless conductivity [32][33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Dual-Purpose Photometric-Conductivity Detector for Simultaneous and Sequential Measurements in Flow Analysis

et al. 2020

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This work presents a new dual-purpose detector for photometric and conductivity measurements in flow-based analysis. The photometric detector is a paired emitter–detector diode (PEDD) device, whilst the conductivity detection employs a capacitively coupled contactless conductivity detector (C4D). The flow-through detection cell is a rectangular acrylic block (ca. 2 × 2 × 1.5 cm) with cylindrical channels in Z-configuration. For the PEDD detector, the LED light source and detector are installed inside the acrylic block. The two electrodes of the C4D are silver conducting ink painted on the PEEK inlet and outlet tubing of the Z-flow cell. The dual-purpose detector is coupled with a sequential injection analysis (SIA) system for simultaneous detection of the absorbance of the orange dye and conductivity of the dissolved oral rehydration salt powder. The detector was also used for sequential measurements of creatinine and the conductivity of human urine samples. The creatinine analysis is based on colorimetric detection of the Jaffé reaction using the PEDD detector, and the conductivity of the urine, as measured by the C4D detector, is expressed in millisiemens (mS cm−1).

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Membraneless vaporization unit for direct analysis of solid sample

Cited by 22 publications

References 14 publications

A disposable blood cyanide sensor

A disposable blood cyanide sensor

Conductometric determination of ammonium ion with a mobile drop

Dual-Purpose Photometric-Conductivity Detector for Simultaneous and Sequential Measurements in Flow Analysis

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