Organic compounds, determination

DEVELOPMENT OF CHEMICAL SENSORS FOR VOLATILE ORGANIC COMPOUNDS DETERMINATION... 

Identification and structural analysis of organic compounds. Determination of trace impurities in a wide range of inorganic materials (spark source mass spectrometry). 

Mansour, M., Thaller, S., andKorte, F. Action of sunlight on parathion. Bull. Environ. Contam. Toxicol, 30(3) 358-364,1983. Manzurola, E. and Apelblat, A. Solubilities of L-glutamic acid, 3-nitrobenzoic acid, p-toluic acid, calcium-L-lactate, calcium gluconate, magnesium-DL-aspartate, and magnesium-L-lactate in water, J. Chem. Thermodyn., 34 (7) 1127-1136, 2002. Maraqa, M.A., Zhao, X., Wallace, R.B., and Voice, T.C. Retardation coefficients of nonionic organic compounds determined by batch and column techniques. Soil Sci. Soc. Am. J., 62(1) 142-152, 1998. 

Tab. 8.6 Standard rate constants for electrode reductions of organic compounds determined by...

Solubility in Various Organic Compound Determined in Russia. Khaishbashev et al (Ref 79) investigated about 200 organic compds and came to the following conclusions a) AN is miscible in all proportions with compds contg OH or NH groups pro-1 vided that the mol wt is not too high b)... 

Fast atom bombardment mass spectrometry (FABMS) has become an important addition to the ionization techniques available to the analytical chemist in recent years. It has been particularly useful in a number of diverse applications which include molecular weight determinations at high mass, peptide and oligosaccharide sequencing, structural analysis of organic compounds, determination of salts and metal complexes, and the analysis of ionic species in aqueous solutions. This paper will focus on some aspects of the quantitative measurement of ionic species in solution. The reader is referred to a more comprehensive review for more details of some of the examples given here as well as other applications (1). 

Maraqua, M.A., X. Zhao, and T.C. Voice. 1998. Retardation coefficients of nonionic organic compounds determined by batch and column techniques. Soil Sci. of Am. J. 

Terada, H., Kosuge, Y., Murayama, W., Nakaya, N., Nunogaki, Y., Nunogaki, K.-I. (1987) Correlation of hydrophobic parameters of organic compounds determined by centrifugal partition chromatography with partition coefficients between octanol and water. J. Chromatogr. 400, 343-351. 

L. V. Vilkov, V. S. Mastryukov and N. I. Sadova, Physical Methods for Studying Organic Compounds Determination of the Geometric Structure of Free Molecules, Khimiya, Leningrad, 1978 Chem. Abstr., 91, 210816a (1979). 

The ionisation constants of many acidic organic compounds determined in water [110a] and in twelve of the most popular dipolar non-HBD solvents [110b] have been compiled, as have the methods of determination [111] and prediction [112] of p.Ka values. Particular attention has been paid to C—H acidic compounds [113]. Whereas the ionisation constants of Bronsted acids and bases for aqueous solutions are well known, the corresponding pAa values for nonaqueous solutions are comparatively scarce. 

Thus the thermodynamic characteristics of adsorption at small coverage of different classes organic compounds determined by gas chromatography show that surface of ful-lerene molecular crystals and surface of graphitized carbon black have essentially different adsorption properties. On adsorption on fullerene crystals the electron-acceptor and electron-donor properties of fullerene molecules are manifested. Adsorption data on fullerenes Ceo nd C70 show that properties of fullerene Ceo a-nd C70 molecules arranged in surface layer of crystals are different. 

The underlying principle behind any S AR is that the molecular structure of an organic compound determines the properties of that compound... 

Donetsk, Ukraine) Fainerman obtained Ay 0.4 mN/m, and from the see of Azow Ay =0.1 mN/m. Parallel to these measurements the content of ionic surfactants was determined by another method and found to be smaller than the surfactant concentration calculated from the surface tension. This is reasonable because the ionic surfactants are only part of the impurities. If we compare the total content of organic compounds determined by the well known oxidation method it usually exceeds by 10 times the content determined from the surface tension by means of Gibbs equation. 

One of the most important problems in the analysis of phthalates from water samples is the detection of these compounds in the samples used as blanks. Phthalates have been detected in purified water commonly used in laboratories, including water distilled in a glass distillation apparatus, MUli-Q water, and commercially available water specially for VOC (Volatile organic compounds) determination. Therefore, special caution should be taken with the experimental use of water in laboratories. Some authors have reported the levels of phthalate esters found in the purified water employed in its studies (see Table 28.4). The concentrations found are frequently... 

The behavior of a number of organic compounds with the reagents listed in the question above was studied. The positive results as well as other tests suggested by these are given below. State to what class each compound belongs, and by reference to tables of the physical properties of organic compounds determine the particular compounds described ... 

Weight of organic compounds determined per unit mass of activated carbon fX/m)... 

Table II.7.6 Organic compounds determined by adsorptive stripping voltammetry on mercury electrodes...

Korenman, I. M. Method of organic compounds determination. Photometric analysis. M. (1970). De Villiers, A., Vanhoenacker, G., Majek, R, and Sondra, P. Determination of anthocyanins in wine by direct injection liquid Chromatography-diode array detection-mass spectrometry and classification of wines using discriminant analysis. J. Chromat.A., 1054 194-204 (2004). 

To accelerate the procedure for bioconcentration tests, some investigators (8, 82, 83y 94) express bioconcentration factor as the ratio of the uptake rate constant to the clearance rate constant k2 in fish. In a flowing-water system, Needly et al. 83) found that the log(BCF) of some stable organic compounds determined from the kinetic rate constants in rainbow-trout muscle can be related to log The regression equation between the observed BCF and the calculated Aow values is... 

Table 1 Examples of organic compounds determined using ECL ...

Tait E, Perry JD, Stanforth SP, Dean JR (2014) Bacteria detection based on the evolution of enzyme-generated volatile organic compounds determination oi Listeria monocytogenes in milk samples. Analytica Chimica Acta. 848 80-7. doi 10.1016/j.aca.2014.07.029. 

ISO 10708 1997(E), Water Quality - Evaluation in an Aqueous Medium of the Ultimate Aerobic Biodegradability of Organic Compounds -Determination of Biochemical Oxygen Demand in a Two-phase Closed Bottle Test, International Organization for Standardization, Geneve, Switzerland, 1997. 

ISO 10708 - 1997 Water quality - Evaluation in an aqueous medium of the ultimate aerobic biodegradability of organic compounds -Determination of biochemical oxygen demand in a two-phase closed-bottle test... 

Semivolatile Organic Compounds Determined Using Altenative Detectors... 

KLO Kloskowski, A., Chrzanowski, W., Pilarczyk, M., and Namiesnik, J., Partition coefficients of selected environmentally important volatile organic compounds determined by gas-liquid chromatography with polydimethylsiloxane stationary phase, J. Chem. Thermodyn., 37,21,2005. 

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