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Determination of hydrazine

Discussion. Hydrazine reacts with potassium iodate under the usual Andrews20 conditions, thus  [Pg.402]

To determine the N2H4,H2S04 content of hydrazinium sulphate, use the following method. [Pg.402]

Procedure. Weigh out accurately 0.08-0.1 g of hydrazinium sulphate into a 250 mL reagent bottle, add a mixture of 30 mL of concentrated hydrochloric [Pg.402]


A sensor for organic chloride-containing compounds was constructed by immobilization of luminol or tris (2,2 bipyridyl) ruthenium (III) between a PMT and a poly (tetrafluoro) ethylene (PTFE) membrane [15], through which a stream of air was sampled by diffusion. A heated Pt filament incorporated in the gas line leading to the CL cell was used to oxidize the analytes prior to diffusion across the PTFE membrane. Detection limits for CC14, CHC13, and CH2C12 were 1.2-4 ppm. A similar device could also be used for the determination of hydrazine and its monomethyl and dimethyl derivatives or NH3 vapor. The detection limit for hydrazine was only 0.42 ppb [16]. [Pg.572]

CO sensor allows detection of CO in the presence of hydrocarbons and other adsorbable contaminants. The membrane Is usually chosen for Its ability to protect the sensing electrode. However, If It has low permeability to air, the sensor will have a slower response time. The electrolyte and counter electrode have also been reported as Influencing selectivity and device performance In the determination of hydrazines (5) and NO2 (9), respectively. Finally, materials of construction are typically Teflon and high-density plastics like polypropylene because such materials must be compatible with reactive gases and corrosive electrolytes. [Pg.302]

Hydroxylamine (NH2OH) can be determined by its colour reaction with di(2-pyridyl) ketone guanylhydrazone [113]. It can also be determined in an indirect method by its reaction with biacetyl to give dimethylglyoxime, which then reacts with Ni(II) [114]. The FIA technique has been applied in the determination of NH2OH with the use of ferrozine [115]. A review has been given of methods used for the determination of hydrazine [116]. [Pg.311]

Accurate determination of hydrazine and dimethylhydrazines in environmental samples is also complicated by the susceptibility of these chemicals to oxidization. Air samples must be analyzed immediately after collection (Cook et al. 1979). Degradation of hydrazine in aqueous samples can be prevented by acidification with sulfuric acid (WHO 1987). [Pg.139]

Alvarez de Laviada T, Romero FJ, Anton V, et al. 1987. A simple microassay for the determination of hydrazine in biological samples. Effect of hydrazine and isoniazid on liver and brain glutathione. J Anal Toxicol 11 260-262. [Pg.155]

Besada A. Analytical use of copper(II)-neocuproine in the spectrophotometric determination of hydrazines. Andytical Letters 21 1917-1925. [Pg.157]

Holtzclaw JR, Rose SL, Wyatt JR. 1984. Simultaneous determination of hydrazine, methylhydrazine, and 1,1-dimethylhydrazine in air by derivatization/gas chromatography. And Chem 56 2952-2956. [Pg.164]

Ravichandran K, Baldwin RP. 1983. Liquid chromatographic determination of hydrazines with electrochemically pretreated glassy carbon electrodes. Anal Chem 55 1782-1786. [Pg.171]

Reynolds BA, Thomas AA. 1965. A colorimetric method for the determination of hydrazine and monomethylhydrazine in blood. Am hid Hyg Assoc J 527-531. [Pg.172]

Stetter JR, Tellefsen KA. 1979. Electrochemical determination of hydrazine and methyl- and... [Pg.174]

Determination of hydrazine, methylhydrazine, and dimethylhydrazine in liquid rocket fuels. [Pg.621]

Both N2H4 and [N2H5] are reducing agents, and reaction 14.36 is used for the determination of hydrazine. [Pg.398]

W. D. Basson and J. F. van Staden, Low Level Determination of Hydrazine in Boiler Feed Water with an Unsegmented High-Speed Continuous Flow System. Analyst, 103 (1978) 998. [Pg.385]

A. T. Faizullah and A. Townshend, Flow Injection Analysis with Chemiluminescence Detection Determination of Hydrazine. Anal. Proc., 22... [Pg.429]

Titrimetric proceedures for the determination of KjEefCN) in alkaline media, also using hydrazine sulphate, have been desaibed. Determination of hydrazine and its derivatives is also important. A back-titration technique involving iodine monochloride in 5M-HC1 as the oxidant is simpler and of wider applicability than previous methods. ... [Pg.442]

Determination of hydrazines in air by Schiff base formation with acetone [35]... [Pg.138]

Karimi Maleh, H., Moazampour, M., Ensafi, AA., Mallakpour, S., and Hatami, M. (2014) An electrochemical nanocomposite modified carbon paste electrode as a sensor for simultaneous determination of hydrazine and phenol in water and wastewater samples. Environ. Sci. PoUut. Res. Int., 21, 5879 - 5888. [Pg.423]

H. Taoda and W. Hu, Highly sensitive determination of hydrazine ion by ion-exclusion chromatography with ion-exchange enhancement of conductivity detection,/. Chromate. A, 1039,135, 2004. [Pg.237]

Gas Chromatographic Method for the Simultaneous Determination of Hydrazine and Its Acetylated Metabolite in Serum Using a Nitrogen-Selective Detector... [Pg.7]

Determination of Hydrazine Metabolites of Isoniazid in Human Urine by Gas Chromatography J. Chromatogr. 138(1) 165-172 (1977) CA 87 126826p... [Pg.253]

It is therefore clear that reliable and sensitive analytical methods are needed for the determination of hydrazine and its derivatives. Techniques have been developed for hydrazine measurements based on spectrophotometry [5], fluorimetry [6], chemiluminescence [7], and chromatography [8]. However, drawbacks of these procedures include diflhcult sample preparation, the need for derivatization, and insufficient sensitivity, which limit their utility. In contrast, electrochemical methods generally present the advantages of simplicity and high sensitivity. [Pg.201]

Kazemi et al. [121] reported the electrochemical fabrication of a conducting polymer of 5,10,15,20-tetra(4-sulfophenyl) porphyrin-nickel as a nanostructured electrocatalyst for hydrazine oxidation. An electrode modified with this electrocatalyst provided a detection limit of 0.11 pmol and a sensitivity of 1 pA L pmoF for the determination of hydrazine, and showed good stability and reproducibility. [Pg.209]

Ozoemena [125] performed the anodic oxidation and amperometric sensing of hydrazine using a glassy carbon electrode modified with a cobalt(ll) phthalocya-nine-cobalt(n) tetraphenylporphyrin (CoPc-(CoTPP)4) supramolecular complex. This amperometric sensor displayed excellent characteristics for the determination of hydrazine in 0.2 M NaOH at low overpotential (+100 mV vs. Ag/AgCl), with very fast amperometric response time (1 s), linear range of 10-230 pmol LT, limit of detection of 1 pmol L and sensitivity of 0.0157 pA L pmol . ... [Pg.214]

Chen et al. [133] synthesized a composite of dispersed graphene carbon nanotubes and iron phthalocyanine (GO-CNT-FePc), which was successfully employed for the electrochemical determination of hydrazine. The modified electrode provided a linear range for hydrazine of 0.5-83.5 pmol L, together with an excellent limit of detection (0.093 amol L ). [Pg.215]

Pingarron JM, Hernandez lO, Gonzalez-Cortes A, Yanez-Sedeno P (2001) Carbon fibre microelectrodes modified with rhodium for the electrocatalytic determination of hydrazine. Anal Chim Acta 439 281-290... [Pg.216]

Afkhami A, Zarei AR (2004) Simultaneous spectrophotometric determination of hydrazine and phenylhydrazine based on their condensation reactions with different aromatic aldehydes in micellar media using H-point standard addition method. Talanta 62 559-565... [Pg.216]

Ensafi AA, Rezaei B (1998) Flow injection determination of hydrazine with fluorimetric detection. Talanta 47 645-649... [Pg.216]

Mani V, Vilian ATE, Chen SM (2012) Graphene oxide dispersed carbon nanombe and iron phthalocyanine composite modified electrode for the electrocatalytic determination of hydrazine, hit J Electrochem Sci 7 12774—12785... [Pg.224]

As an example, AuNPs capped with NiTAPc were immobilization on 1,6-hexanedithiol (HDT) modified Au electrode for the determination of hydrazine, Fig. 35 [148]. The NiTAPc/AuNPs electrode showed a sharp oxidation peak for hydrazine at 0.17 V (Fig. 35c) which is at much less positive potential (with higher currents) than at the bare Au electrode or NiTAPc alone. Thus, the AuNPs enhances the electrocatalytic activity of NiTAPc. [Pg.261]

Ojani R, Raoof JB, Norouzi B (2008) Acetylferrocene modified carbon paste electrode a sensor for electrocatalytic determination of hydrazine. Electroanalysis 20 1378-1382... [Pg.490]


See other pages where Determination of hydrazine is mentioned: [Pg.402]    [Pg.572]    [Pg.192]    [Pg.314]    [Pg.192]    [Pg.86]    [Pg.87]    [Pg.139]    [Pg.267]    [Pg.2422]    [Pg.327]    [Pg.356]    [Pg.189]    [Pg.209]   


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Determination of Hydrazine and Its Derivatives

Of hydrazine

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