EXTRACTION-SPECTROPHOTOMETRIC DETERMINATION OF NICKEL WITH 4-(2-PYRIDYLAZO) RESORCINOL IN THE NEONOL AF 9-10 – WATER SYSTEM

Phase equilibria in the neonol AF 9-10 – water system were studied using the visual-polythermal method. Value of lower critical dissolution temperature was determined (68°C). In order to assess the extraction capacity of system, the distribution of number of organic reagents was studied. It was found that increase in reagent hydrophilicity leads to decrease in its distribution coefficient. An extraction-spectrophotometric method for the determination of 1,2–2,4 mg/l nickel with 4-(2-pyridylazo) resorcinol (PAR) in the neonol AF 9-10 – water system has been proposed. It was found that ratio of nickel : PAR in the complex compound is 1: 2.

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Third Derivative Spectrophotometric Method for Simultaneous Determination of Copper and Nickel Using 6-(2-Naphthyl)-2, 3-dihydro-1,2,4- triazine-3-thione

E-Journal of Chemistry ◽

10.1155/2011/905139 ◽

2011 ◽

Vol 8 (2) ◽

pp. 587-593 ◽

Cited By ~ 2

Author(s):

Maliheh Barazandeh Tehrani ◽

Effat Souri

Keyword(s):

Simultaneous Determination ◽

Spectrophotometric Method ◽

Limit Of Detection ◽

Alloy Sample ◽

Zero Crossing ◽

Determination Of Nickel ◽

Analytical Reagent ◽

Third Derivative ◽

Determination Of Copper

A simple and sensitive derivative spectrophotometric method for simultaneous determination of nickel and copper using 6-(2- naphthyl)-2,3-dihydro-1,2,4-triazine-3-thione (NDTT) as a selective analytical reagent was developed. The complexes of metal ions with NDTT were formed immediately in basic media and extracted with chloroform. The zero-crossing measurement technique was found suitable for the direct measurement of the third-derivative value of Ni-NDTT and Cu-NDTT at 501 and 472 nm respectively. Beer’s law is obeyed in the concentration range 1-30 μg/mL for both cations with different ratios. The limit of detection was 0.26 μg/mL and 0.13 μg/mL for copper and nickel respectively. The within day and between day variations showed coefficient of variation (CV%) values less than 2.80 and 2.97 for copper and nickel respectively. The error of the determination method did not exceed 6.50%. Analysis of alloy sample showed that this method can be successfully used for simultaneous determination of Cu and Ni in real samples.

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Spectrophotometric Method for Simultaneous Determination of Nickel and Cobalt

Analytical Chemistry ◽

10.1021/ac60120a025 ◽

1956 ◽

Vol 28 (12) ◽

pp. 1897-1898 ◽

Cited By ~ 11

Author(s):

R. D. Whealy ◽

S. O. Colgate

Keyword(s):

Simultaneous Determination ◽

Spectrophotometric Method ◽

Determination Of Nickel

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

Вестник Пермского университета Серия «Химия» = Bulletin of Perm University CHEMISTRY ◽

10.17072/2223-1838-2021-2-103-113 ◽

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.

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