scholarly journals Azo-Substitute of EthoxyAcridine – A New Reagent for Extraction-Photometric Determination of Tellurium (IV)

2016 ◽  
Vol 12 (11) ◽  
pp. 4476-4479
Author(s):  
N.I. Ismayilov ◽  
A.M. Pashajanov ◽  
G.R. Muradova
Keyword(s):  
Elemental Analysis ◽  
Spectrophotometric Method ◽  
Light Absorption ◽  
Photometric Determination ◽  
Chloride Complexes ◽  
Azo Group ◽  
Analytical Properties ◽  
Determination Methods ◽  
Physical And Chemical

We studied associates of halogen telluride (Cl, Br) with 9-amine-4-ethoxyacridine-6-azo-N-N′-diethylaniline (AEADEA) by spectrophotometric method. It was established that associates are extracted well with chloroform-acetone (3:2). We determined the compositions, physical and chemical and analytical properties of complexes (εk, βKD, D, R%). Maximum light absorption for chloride complexes is found to be λmax 520 nm, but for bromide complexes - λmax 530 nm. For establishing the composition of azo- substitute ofethoxyacridine the synthesized reagents were exposed to elemental analysis, as well titanometrictitration by azo group. We developed new extraction-photometric determination methods of tellurium. Lambert-Beer law is observed in the range 0.5-15 mkgTe at 5 ml medium.

scholarly journals Azo-substituted ethoxyacridine – reagents for the extraction-photometric determination of gallium

2019 ◽  
Vol 58 (5) ◽  
pp. 70-74
Author(s):  
Namig I. Ismailov ◽  
◽  
Sevinj N. Osmanova ◽  
Keyword(s):  
Light Absorption ◽  
Photometric Determination ◽  
Molar Ratio ◽  
Chloride Complexes ◽  
Gallium Chloride ◽  
Molar Ratios ◽  
Straight Line ◽  
Physico Chemical ◽  
Ionic Associates

The associates of halide (chloride) complexes of gallim azo-substituted ethoxyacridine have been studied by spectrophotometric method. It has been found that the associates are well extracted with a mixture of dichloroethane-acetone (3:2). The optimum volume of aqueous and organic phase is equal to 5 ml. The molar ratio of the components in the extractable compounds was studied by the methods of isomolar series, equilibrium shift and a straight line. It was found that gallium chloride associated with azo-ethoxyacridines (AE) in a ratio of 1:1. It was studied formation and extraction of associates of gallium chloride with AEADPA (2-ethoxy-6-(4-N,N-dipropylphenylazo)-9-aminoacridine) and AEAN (2-ethoxy-6-(2-hydroxynaphthylazo)-9aminoacridine). The maxima of light absorption of gallium chloride with AEADPA is observed at 520 nm, and the AEAN at 510 nm. The light absorption of the extracts of associates coincides with the absorption maxima of azoethoxyacridines, which indicates the electrostatic character of the interaction and the formation of complexes. Study of the effect of foreign ions on the accuracy of the determination of gallium with azo-substituted ethoxyacridine showed that the number of ions does not interfere (in parentheses are multiple relationships to gallium ions); Zn2+ (2000), NiII (1500), CuII (2500), CoII (1400), Cr III(1100), PbI (2250), Al3+(1600), Cd2+(700), FeII (1050), ReVII (500), PdIII (1200), Tl (2500). Number of ions interfered the determination: TeIV(1), FeIII (1), AuIII (1), SbV(1), TlIII(1), SeIV(3). The physico-chemical and analytical characteristics of the azo-substituted ethoxyacridines and their ionic associates with chloride gallium acidic complexes (λmax ε, βkD, D, R%) were determined. It was shown that chloro-gallium compounds with azo-substituted ethoxyacridines are ionic associates, the molar ratios of the components in which are: [Ga3+] : [Cl-] : R+ = 1:4:1.

scholarly journals Development of a spectrophotometric method for determination of ions Cu (II) C N- (2-hydroxybenzoyl) -N '- (p-tosil)hydrazine in ammonia media

2021 ◽  
Vol 11 (2) ◽  
pp. 103-113
Author(s):  
Yulia B. Elchishcheva ◽  
◽  
Ksenia S. Gorbunova ◽  
Petr T. Pavlov ◽  
◽  
...  
Keyword(s):  
Complex Compound ◽  
Spectrophotometric Method ◽  
Light Absorption ◽  
Conductometric Titration ◽  
Calibration Graph ◽  
Optimal Time ◽  
Optimal Conditions ◽  
Molar Ratios ◽  
Photometric Technique

A spectrophotometric method for the determination of Cu (II) ions with N- (2-hydroxybenzoyl) -N '- (p-tosyl) hydrazine (GBSH) in ammonia media has been developed. The optimal conditions for the formation of a complex compound are found: the wavelength of maximum light absorption; pH complexation; optimal time for color development; the amount of photometric reagent. Under optimal conditions of complexation of GBSG with Cu (Ⅱ) ions (λ = 401 nm, pH = 9.2, τ = 30 minutes, VGBSG = 3.75 ml), a calibration graph is constructed. The Bouguer-Lambert-Beer law is fulfilled in the range from 0.13 to 1.59 mg Cu (II) / 25 ml. The true molar light absorption coefficient of the complex compound of HBSG with Cu (Ⅱ) ions in the ammonia medium was 1480. The molar ratios in the solution of the complex compound were determined by the methods of saturation, shift of equilibria and conductometric titration - [Cu (Ⅱ)]: [HBSG] = 1: 1. According to Babko's method, the conditional constant of stability of the GBSG complex with Cu (Ⅱ) ions was calculated and it was 4.4 × 1010. The reproducibility and relative error of the developed photometric technique were determined by the method of mathematical statistics.

scholarly journals Development of Extractive Spectrophotometric Determination of Rhodium (III) using Schiffs Base as An Analytical Reagent

2021 ◽  
pp. 1101-1105
Author(s):  
Mrs. Ritika Makhijani
Keyword(s):  
Aqueous Solution ◽  
Elemental Analysis ◽  
Spectrophotometric Method ◽  
Molar Absorptivity ◽  
Amyl Alcohol ◽  
Schiff’S Base ◽  
Analytical Reagent ◽  
Ph Range ◽  
Method Show

Rh (III) was determined by simple, sensitive & feasible spectrophotometric method by using analytical reagent N - (o - methoxy benzaldehyde) 2-aminophenol (NOMBAP) . Elemental analysis was used to characterize synthesized Schiff’s base NOMBAP. Rh (III) is extracted quantitatively (99.66%) by NOMBAP into carbon tetra chloride from an aqueous solution having pH range 5.1 – 5.9. An intense peak at 480 nm (λ max) was observed in the extract of n-amyl alcohol. Beer’s law is obeyed over the concentration range 1.0 – 10.0 µg/ml for Rh (III). The molar absorptivity and Sandel’s sensitivity for Rh - NOMBAP system is 8248.23 dm3 mole-1cm-1and 0.08332 μgcm-2 respectively. Mole Ratio & Job’s Continuous Variation and Method show that the extracted species has composition 1:3 (Rh-NOMBAP). Study has been done for interference by various ions. For determination of Rh (III) in alloy the proposed method has been used.

Quantitative Determination of Some Inhibitors in Polymers by Light Absorption

1947 ◽  
Vol 20 (1) ◽  
pp. 55-62 ◽  
Author(s):  
F. W. Banes ◽  
L. T. Eby
Keyword(s):  
Quantitative Determination ◽  
Spectrophotometric Method ◽  
Light Absorption ◽  
Chemical Methods ◽  
Background Absorption

Abstract A spectrophotometric method of analysis for inhibitors in polymers has been developed. This method corrects for background absorption and has been found to be rapid and more reliable than chemical methods of analyses which were investigated.

THE IMPORTANCE OF THE RED BOOK OF SOILS FOR MONITORING AND JUSTIFICATION OF CONSERVATION MEASURES

2020 ◽  
Author(s):  
O.S. Bezuglova ◽  
Keyword(s):  
Chemical Properties ◽  
Natural State ◽  
Soil Maps ◽  
Rostov Region ◽  
Conservation Measures ◽  
Background Data ◽  
The Russian Federation ◽  
Physical And Chemical ◽  
And Chemical Properties

Rostov Region belongs to the highly protected natural territories characterized by the continuous plowing. There territories are the only reserves with the soils preserved in their natural state. However, these areas often lack detailed information about the soils quality and composition. Surveying soils on these territories is crucial for determination of their basic physical and chemical properties. The resulted compilation of soil maps could lay a foundation for creating the Red Book of Soils and the formation of a section in the soil-geographical database of the Russian Federation. Subsequently, such information can be used as a background data for the main types of soils in the region. It will be also valuable during monitoring and justification of conservation measures.

Extractive Spectrophotometric Method for the Determination of Glibenclamide by Ion-Pair Complex in Pure Form and Pharmaceutical Formulation

2019 ◽  
Vol 9 (o3) ◽  
Author(s):  
RUAA MUAYAD MAHMOOD ◽  
HAMSA MUNAM YASSEN ◽  
SAMAR , NAJWA ISSAC ABDULLA AHMED DARWEESH ◽  
NAJWA ISSAC ABDULLA
Keyword(s):  
Spectrophotometric Method ◽  
Molar Absorptivity ◽  
Ion Pair ◽  
Pharmaceutical Formulation ◽  
Ratio Method ◽  
Colored Complex ◽  
Colored Product ◽  
Method Of Continuous Variation ◽  
Job's Method

Simple, rapid and sensitive extractive spectrophotometric method is presented for the determination of glibenclamide (Glb) based on the formation of ion-pair complex between the Glb and anionic dye, methyl orange (MO) at pH 4. The yellow colored complex formed was quantitatively extracted into dichloromethane and measured at 426 nm. The colored product obeyed Beer’s law in the concentration range of (0.5-40) μg.ml-1. The value of molar absorptivity obtained from Beer’s data was found to be 31122 L.mol-1.cm-1, Sandell’s sensitivity value was calculated to be 0.0159 μg.cm-2, while the limits of detection (LOD) and quantification (LOQ) were found to be 0.1086 and 0.3292 μg.ml-1, respectively. The stoichiometry of the complex created between the Glb and MO was 1:1 as determined via Job’s method of continuous variation and mole ratio method. The method was successfully applied for the analysis of pharmaceutical formulation.

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