Spectrophotometric determination of molybdenum in steel with 3:3':4':5:7-pentahydroxyflavanone

Chan, Frank L.; Moshier, Ross W.

doi:10.1016/0039-9140(60)80029-x

Cited by 19 publications

(4 citation statements)

References 6 publications

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“…The proposed procedure is very simple, selective, and rapid and more sensitive than most of the existing methods [1][2][3][4][5][6][13][14][15][16][17] and has much wider tolerance limits 18 of foreign ions. Analyzing several synthetic and technical samples of different composition as shown in Table 2 has further tested the validity of the method.…”

Section: Beer's Law and Sensitivitymentioning

confidence: 99%

“…Various reagents including chromone derivatives [1][2][3][4][5][6] reported in the literature are not suitable for routine analysis of the metal as these are prone to be affected by many interferences 5,6 and suffer from low sensitivity. [1][2][3][4][5][6] We have observed that 6-chloro-3-hydroxy-2-(5′-methylfuryl)-4H-chromene-4-one (CHMFC), compared with all above mentioned chromones, gives the most sensitive and selective reaction with molybdenum(VI), when the colored species is extracted into 1,2-dichloroethane from weakly acetic acid medium. The proposed procedure is simple, rapid and more highly sensitive than other chromones reported to form binary complexes with molybdenum, and the system is free from several common interferences including tungsten and vanadium.…”

Section: Introductionmentioning

confidence: 99%

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6-Chloro-3-hydroxy-2-(5′-methylfuryl)-4H-chromene-4-one as an Analytical Reagent for Micro Determination of Molybdenum(VI)

Bishnoi¹,

Dass²,

Sharma

2004

ANAL. SCI.

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6-Chloro-3-hydroxy-2-(5'-methylfuryl)-4H-chromene-4-one (CHMFC) has been used as an analytical reagent for the spectrophotometric determination of molybdenum. Molybdenum(VI) in the presence of several cations, anions and complexing agents forms a yellow 1:2 complex with CHMFC. The complex is quantitatively extractable into 1,2-dichloroethane from 1 mol dm(-3) acetic acid medium and is stable for more than 6 h. The complex shows an absorption maximum at 438 nm with a molar absorptivity of 5.36 x 10(4) dm3 mol(-1) cm(-1) and Sandell's sensitivity equal to 0.0017 microg Mo cm(-2). The method obeys Beer's law up to 1.9 microg Mo ml(-1). The relative standard deviations are 0.2% for solutions and 0.5-1.5% for solid samples. The method is simple, selective, precise and rapid, and has been satisfactorily applied to the micro determination of molybdenum in various synthetic and standard samples.

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Section: Beer's Law and Sensitivitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

6-Chloro-3-hydroxy-2-(5′-methylfuryl)-4H-chromene-4-one as an Analytical Reagent for Micro Determination of Molybdenum(VI)

Bishnoi¹,

Dass²,

Sharma

2004

ANAL. SCI.

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“…The colors formed by molybdenum with 3,3 ',4', 5,7-pentahydroxy fia vone (dihydroquercetin) (46) with 8-mercaptoquinoline (94), with thiocyanate (182), and with diphenylcarbazone (223) were made the basis for its colorimetric determination. Generally the molybdenum was separated from interfering elements by solvent extraction.…”

Section: Molybdenummentioning

confidence: 99%

Ferrous Metallurgy

Beeghly¹,

Pásztor²

1961

Anal. Chem.

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“…Several analytical methods for determination of molybdenum using different reagents [2,8,9] like chromone derivatives [10,11] have been reported. ese methods, however, suffer from a large number of interferences [11][12][13][14] and low sensitivity [2,[8][9][10][11][12][13][14][15][16] due to which they are unsuitable for the routine determination of molybdenum in the samples with diverse matrices.…”

Section: Introductionmentioning

confidence: 99%

Extractive Spectrophotometric Method for Determination of Molybdenum in Steels and Environmental Samples

Dass¹,

Kapoor

Gambhir

2012

Journal of Chemistry

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An extractive spectrophotometric method has been developed for microdetermination of molybdenum. At room temperature Mo(VI) was reduced to Mo(V) in 2 M H2SO4using ascorbic acid as a reductant. The Mo(V) formed a yellow-coloured (1 : 2) complex with 6-chloro-3-hydroxy-2-(3′-hydroxyphenyl)-4-oxo-4H-1-benzopyran (CHHB). The complex was quantitatively extracted into toluene and absorbed maximum atλmax404 nm. Beer’s law was obeyed over the concentration range of 2.31 μg Mo ml−1with a molar absorptivity and Sandell's sensitivity of5.62×104 L mol−1 cm−1and 0.0016 μg Mo cm−2, respectively. The relative standard deviation was 0.0025 (in absorbance units) for 10 replicate determinations of 1 μg Mo ml−1. The method was free from the interference of large number of analytically important elements. Molybdenum has been determined satisfactorily in different technical, synthetic, and environmental samples with improved accuracy and precision.

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Spectrophotometric determination of molybdenum in steel with 3:3':4':5:7-pentahydroxyflavanone

Cited by 19 publications

References 6 publications

6-Chloro-3-hydroxy-2-(5′-methylfuryl)-4H-chromene-4-one as an Analytical Reagent for Micro Determination of Molybdenum(VI)

6-Chloro-3-hydroxy-2-(5′-methylfuryl)-4H-chromene-4-one as an Analytical Reagent for Micro Determination of Molybdenum(VI)

Ferrous Metallurgy

Extractive Spectrophotometric Method for Determination of Molybdenum in Steels and Environmental Samples

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