P determination of

Hold U, Lenzer T, Luther K, Reihs K and Symonds A C 2000 Collisional energy transfer probabilities of highly excited molecules from kinetically controlled selective ionization (KCSI). I. The KCSI technique experimental approach for the determination of P(E, E) in the quasicontinuous energy ranged. Chem. Phys. 112 4076-89... 

Most of ions do not interfere to the determination of P(V) or As(V). Big access of colored transition metals can be tolerated by using those metals solution as reference solution. It was already shown that high selectivity of the proposed method with respect to metal ions gave the opportunity to determine phosphoms in a number of nonferrous (brass, bronze) and ferrous alloys without preliminai y sepai ation. 

Two procedures for the extraction-spectrophotometric determination of P(V) and As(V) have been developed. 

Spectrophotometric methods based on an enhancement of the blue color produced on reduction of 12-molybdophosphate (arsenate) in the presence of antimony(III) are widely used for the determination of phosphoms(V) or arsenic(V). However, nature of heteropoly blue, their spectra, mechanism of the reaction are obscure. In addition, mixed POMs were shown as very efficient analytical forms for the determination of P(V) and As(V). 

Test method using lA with MG and spectrophotometric procedure were developed for the phosphate determination. Test method allows determination of P(V) in the 10-100 p.g/1 concentration range. Spectrophotometric procedure able to determining lower than 3 p.g/1 P(V) was used for determination it in waters. 

The following substituents listed in Table IV were omitted in the determination of p S-SOs", 4-SOs", 3-C02", and 4-CO2". For these ionic substituents a strong dependence of the a-values calculated on ionic stren h was observed, and it was impossible to extrapolate to zero ionic strength cf. H. Zollinger, W. Btichler, and C. Wittwer, Helv. Chim. Acta 36, 1711 (1953). 

Alkalinity and Lime Content. Alkalinity is the ability of a solution or mixture to react with an acid. The phenolphthalein alkalinity refers to the amount of acid required to reduce the pH to 8.3, the phenolphthalein endpoint. The phenolphthalein alkalinity of the mud and mud filtrate is called the and Pp respectively. The P. test includes the effect of only dissolved bases and salts while the P test includes the effect of both dissolved and suspended bases and salts. The methyl orange alkalinity refers to the amount of acid required to reduce the pH to 4.3, the methyl orange endpoint. The methyl orange alkalinity of the mud and mud filtrate is called the and Mp respectively. The API diagnostic tests include the determination of P, Pp and Mp All values are reported in cubic centimeters of 0.02 N (normality = 0.02) sulfuric acid per cubic centimeter of sample. 

For many metals and alloys the determination of /p is complex, and its magnitude is governed by many factors such as surface finish, rate of formation, alloying constituents, and the presence of those anions, such as halides, that promote localised breakdown. In many instances the attack on passive films by halide ions shows a temperature and concentration dependence similar to the effect of hydrogen ions, i.e. the rate of film dissolution increases with concentration in accordance with a Freundlich adsorption relationship... 

Accordingly, counting the noncongruent free trees of a certain type is reduced to counting the nonequivalent configurations of the planted trees of the corresponding type, in particular the determination of p is reduced to the computation of to that of... 

Although Flory takes into account the release of water in the determination of p, he does not do so in the following calculations assuming that... 

If water elimination is taken into consideration in the determination of p it must also be allowed for throughout the calculation. Thus, relation (22) leads to ... 

If one sets p r2 this leads ultimately to the determination of p from the cubic equation... 

It was found that the law of proportionality (12) holds good only if the solution is dilute, and in the determination of

different concentrations in dilute solutions, plotting these against the concentrations, and extrapolating to zero concentration, or infinite dilution (H.M., 67). 

The determination of biaxially oriented film is comparatively straightforward, as the radiation propagates in the direction normal to the plane of the film and the polarization direction is parallel or perpendicular to the draw direction. theoretical analysis are given in detail in a separate publication 6). 

The term pt is a binary interaction parameter which must be determined from phase equilibrium data. We will discuss determination of p 9 values in more detail later. 

CranmerM. 1970. Determination of p-nitrophenol in human urine. Bull Environ Contam Toxicol... 

Yates CR, Chang C, Kearbey JD, Yasuda K, Schuetz EG, Miller DD, et al. Structural determinants of P-glycoprotein-mediated transport of glucocorticoids. Pharm Res 2003 20 1794-803. 

LaClair (44) and Soloway et al. (SO) have modified the dehydrohalogenation reaction to permit the determination of p,p -DDT in dusts and oil solutions containing technical DDT. The reaction between the base and the halide is carried out at 20° to 30° C., as Cristol (16) has found that under proper conditions at this temperature the p,p -DDT reacts completely, whereas the o,p -DDT and most of the impurities react only slightly. The Association of Official Agricultural Chemists (3) tentative method for the determination of the purity of p,p -DDT, which employs the dehydrohalogenation procedure, has been modified by Fleck (30) so that the reaction is carried out at 25° C. instead of under reflux conditions. 

Cristol et al. (17) have based a method for the determination of p,p -DDT in technical DDT on the fact that the p,pf isomer is almost insoluble in 70% aqueous ethyl alcohol and the o,p isomer is soluble. The method has not been tried with mixtures of the other chlorinated hydrocarbons. 

G.F. Hall, D.J. Best, and A.P.F. Turner, The determination of p-cresol in chloroform with an enzyme electrode used in the organic phase. Anal. Chim. Acta 213,113-119 (1988). 

Bermejo-Barrera et al. [64] studied the use of lanthanum chloride and magnesium nitrate as modifiers for the electrothermal atomic spectrometric determination of p,g/l levels of arsenic in seawater. 

Urichuk LJ, Aspeslet LJ, Holt A, Silverstone PH, Coutts RT, et al. 1997. Determination of p-trifluoromethylphenol, a metabolite of fluoxetine, in tissues and body fluids using... 

Shah, P. A., and Quinones, L. (1995). Validation of a micellar electrokinetic capillary chromatography (MECC) method for the determination of p-toluenesulfonic acid impurity in a pharmaceutical intermediate./. Liq. Chromatogr. 18, 1349 — 1362. 

As discussed earlier (III.A.2(a)), Cowley, White and Manatt(1967,28) had previously undertaken a quantitative determination of P-P coupling... 

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