N-Aryl-3-Aminopropionic acids as selective reagents for the determination of copper in metallurgical products

Abstract

Analytical characteristics of N,N-di(2-carboxyethyl)aniline ( I ), N,N-di(2-carboxyethyl)-3,4-xylidine ( II ), N-(2-carboxyethyl)anthranilic acid ( III ), N,N-di(2-carboxyethyl)-4,5-dimethylaminoazobenzene-4'-sulfonic acid ( IV ), and N-(2-carbamoylethyl)anthranilic acid ( V ) were studied. The factors affecting the selectivity of I -V for Cu(II) ions (basicity of the amino group, nature and positions of substituents in the benzene ring, and geometry of chelate cycles) were analyzed. The optimum conditions were found and procedures were developed for the spectrophotometric determination of copper in metallurgical products. The high selectivity of I -V for Cu(II) ions allows the determination without preliminary separation of concomitant components in aqueous solutions without organic solvents. Compound II exhibits the best analytical characteristics: the analytical range of copper 3-20 mg/L, detection limit 0.7 mg/L, ε ( λ = 252 nm) = 3290 L mol -1 cm -1 , and pH 6.0 (ammonia-acetate buffer solution).

Ion Pairs of 5,5-dimethyl-2-(2-hydroxy-3,5-disulfophenylhydrazo)cyclohexane-1,3-dione with Cationic Surface-Active Substances as Analytical Reagent for Determination of Copper(II)

“…The influence of oxalic, citric, and tartaric acids, EDTA, carbamide, thiocarbamide, Na 2 HPO 4 Á 12H 2 O, and NH 4 F on the selectivity of determining copper was studied as well, showing that the solution under analysis can contain all of these curtain substances, with the exception of EDTA, which can be presented only in small amounts. Taking into consideration all these analytical parameters, one can conclude that the proposed method is more selective than other similar methods (Podchainova and Simonova 1990;Chimpalee et al 1996;Li, Jiang, Lin 1997;Thakur and Deb 1999;Barreto Nozaki, and Barreto 1999;Karabocek et al 2000;Yun and Choi 2000;Winkler and Arenhö vel-Pacula 2000;Donglan et al 2002;Neudachina et al 2005;Du et al 2005;Kaur and Malik 2007;Sharma and Singh 2009).…”

“…The developed method is more selective, sensitive, reproducible, rapid, cheap, and simple than in most of the analogous methods cited in literature (Nolan 1983;Potts 1987;Podchainova and Simonova 1990;Chimpalee et al 1996;Li et al 1997;Ali et al 1998;Thakur and Deb 1999;Barreto et al 1999;Almeida et al 2000;Karabocek et al 2000;Yun and Choi 2000;Winkler and Arenhövel-Pacula 2000;Campos et al 2002;Donglan et al 2002;Ferreira at al. 2002;and Queiroz et al 2002;Cassella et al 2005;Du et al 2005;Neudachina et al 2005;Kaur and Malik 2007;Mohadesi and Taher 2007;Mashhadizadeh et al 2008;Sharma and Singh 2009). For these reasons, it can be used in routine analysis and can be applied for the determination of copper in a diversity of objects.…”

“…T. MAHMUDOV ET AL. Picramine-epsilon (Podchainova and Simonova 1990) N,N-Di(2-carboxyethyl)-3,4-xylidine (Neudachina et al 2005) Na(I) where A i and A k are the absorbances of the complexes in experiments i and k, e is the molar absorption coefficient of the complex, l is the thickness of the cell (cm), c i and c k are the concentration of copper in experiments i and k, and q is the number of molecules which form the complex. The polymerization coefficients of the complexes were calculated and it was found that these complexes occurred as monomers rather than as polymers.…”

“…This effect was characterized by the maximum permissible species-copper weight ratios for an error of determination lower than 5% (Table 3). Thus, a comparison of the selectivity of the reagents for the determination of copper(II) listed in the assortment (Podchainova and Simonova 1990) and the recently published method (Neudachina et al 2005) with that of our H 2 L-CSAS system shows that H 2 L, in nearly all the cases, is more selective in both the presence and absence of CSAS (Table 3), while the systems studied here increases the selectivity with modification of H 2 L with CSAS.…”

Poly(vinyl) chloride membrane copper-selective electrode based on 1-phenyl-2-(2-hydroxyphenylhydrazo)butane-1,3-dione

“…Various analytical techniques have been proposed for determination of copper including spectrophotometric methods [8][9][10][11][12][13][14], atomic absorption spectrometry (AAS) [15,16], cold vapour AAS or flame AAS with electrothermal atomization [17,18], inductively coupled plasma emission spectrometry [19,20], gravimetry [21,22], chromatography [23,24], and anodic stripping voltam- 3.1 × 10 −6 5 × 10 −6 to 5 × 10 −2 5 29.8 Na + , Ni 2+ , Hg 2+ [33] 3,4,10,11-Tetraphenyl-1,2,5,8,9,12,13-octaaza-cyclotetra-deca-7,14-dithizone-2,4,9,11-tetraene 1.6 × 10 −6 1 × 10 −5 to 1 × 10 −2 2 2 7 N a + , K + , Mg 2+ , Ca 2+ , Ba 2+ , Zn 2+ , Cd 2+ , Hg 2+ , Pb 2+ , Fe 3+ , Al 3+ [34] 1,15-Diaza-3,4;12,13-dibenzo-5,8,11,18,21-pentaoxacyclotrieicosane-2,14-dione 1.2 × 10 −5 1 × 10 −5 to 1 × 10 −1 20 30.0 Na + , K + , Cs + , Sr 2+ [35] Aza-thioether crown containing a 1,10-phenanthroline 8.0 × 10 −6 1 × 10 −5 to 1 × 10 −1 15 29.4 Ag + , La 3+ [36] 2 -Picolyl sym-dibenzo-16-crown-5 ether 1.0 × 10 −6 1 × 10 −5 to 1 cost of the carrier synthesis [35,37,45,61]. In fact, the described sensors, although being prepared independently, have rather similar parameters (e.g.…”