Measurement of 2,4-toluene diisocyanate concentrations by different samplers

Tsai, Chuen-Tinn; Lin, Hsi Chen; Shih, Tiffany Ting-Fang; Chang, Kai Chung; Hung, I-Fu; Deshpande, C. G.

doi:10.1016/j.jhazmat.2006.04.032

Cited by 3 publications

(3 citation statements)

References 17 publications

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“…Short term exposure of TDI vapor resulted in air-4 in the airways of the exposed group (Kouadio et al, 2005). In airways, because of high humidity, most of airborn TDI are lost quickly (Tsai et al, 2006 ) can be explained, especially for asthma.…”

Section: Discussionmentioning

confidence: 99%

Toluene diisocyanate (TDI) induces calcium elevation and interleukine-4 (IL-4) release - Early responses upon TDI stimulation

et al. 2010

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-Occupational exposure to toluene diisocyanats (TDI) may cause asthma. In asthma patients, the allergic syndromes correlate cytokine production with the elevation in cytosolic calcium concentration [Ca 2+ ] c of lymphocytes in airway. We previously found TDI induces calcium signaling in neuronal cells. TDI mainly gets into human body via inhalation; therefore this study investigated the possibility of TDI inducing the changes in

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Section: Discussionmentioning

confidence: 99%

Toluene diisocyanate (TDI) induces calcium elevation and interleukine-4 (IL-4) release - Early responses upon TDI stimulation

et al. 2010

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“…A denuder/filter combination is able to measure and discriminate between gas-and particle-phases and is widely used to avoid positive artefacts on particle samples [39]. Denuders have been used for the sampling of polycyclic aromatic compounds [40][41][42], carbonyl compounds [43][44][45][46][47], diisocyanates [48,49], gaseous mercury [50,51], reactive iodine species [52] and other inorganic and organic compounds (see also [53,54] and references therein). Typically denuders are coated with a medium suitable for retaining the target compounds.…”

Section: Introductionmentioning

confidence: 99%

Denuder sampling techniques for the determination of gas-phase carbonyl compounds: A comparison and characterisation of in situ and ex situ derivatisation methods

Kahnt

Iinuma

Böge

et al. 2011

Journal of Chromatography B

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“…Both instrumental and continuous monitoring methods have been developed in this regard as reviewed by Guglya. 2 As shown in Table S1, for the instrumental methods, 7 such as high performance liquid chromatography (HPLC), 8, 9 capillary gas chromatography (CGC) with flame ionization 10, 11 and ion chromatography with UV detection, 12, 13 the derivatization and extraction steps are quite time-consuming. Moreover, such offline strategies provide significant statistical differences as compared to online protocols.…”

Section: Introductionmentioning

confidence: 99%

2,4-Toluene diisocyanate detection in liquid and gas environments through electrochemical oxidation in an ionic liquid

Lü

Rehman

Chi

et al. 2016

Analyst

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The electrochemical oxidation of 2,4-toluene diisocyanate (2,4-TDI) in an ionic liquid (IL) has been systematically characterized to determine plausible electrochemical and chemical reaction mechanisms and to define the optimal detection methods for such a highly significant analyte. It has been found that the use of an IL as the electrolyte allows the oxidation of 2,4-TDI to occur at a less positive anodic potential with no side reactions as compared to traditional acetonitrile based electrolytes. UV-Vis, FT-IR, Cyclic Voltammetry and Electrochemical Impedance Spectroscopy (EIS) studies have revealed the unique mechanisms of dimerization of 2,4-TDI at the electrode interface by self-addition reactions, which can be utilized to improve the selectivity of detection. The study of 2,4-TDI redox chemistry further facilitates the development of a robust amperometric sensing methodology by selecting a hydrophobic IL ([C4mpy][NTf2]) and by restricting the potential window to only include the oxidation process. Thus, this innovative electrochemical sensor is capable of avoiding the two most ubiquitous interferents in ambient conditions (i.e. humidity and oxygen), thereby enhancing the sensor performance and reliability for real world applications. The method was established to detect 2,4–TDI in both liquid and gas phases. The limits of detection (LOD) values were 130.2 ppm and 0.7862 ppm, respectively, for the two phases, and are comparable to the safety standards reported by NIOSH. The as-developed 2.4-TDI amperometric sensor exhibits a sensitivity of 1.939 μA/ppm. Moreover, due to the simplicity of design and the use of an IL both as a solvent and non-volatile electrolyte, the sensor has the potential to be miniaturized for smart sensing protocols in distributed sensor applications.

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Measurement of 2,4-toluene diisocyanate concentrations by different samplers

Cited by 3 publications

References 17 publications

Toluene diisocyanate (TDI) induces calcium elevation and interleukine-4 (IL-4) release - Early responses upon TDI stimulation

Toluene diisocyanate (TDI) induces calcium elevation and interleukine-4 (IL-4) release - Early responses upon TDI stimulation

Denuder sampling techniques for the determination of gas-phase carbonyl compounds: A comparison and characterisation of in situ and ex situ derivatisation methods

2,4-Toluene diisocyanate detection in liquid and gas environments through electrochemical oxidation in an ionic liquid

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