Direct spectrophotometric determination of zirconium with spadns

Banerjee, Gurupada

doi:10.1016/s0003-2670(00)89889-x

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Metallic Ions and Simple Anions1

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1958

2020

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Cited by 25 publications

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“…Colorimetric procedures for zirconium use Alizarin Red S (230), SPADNS (22), the arsenazo reagent (365), and pyrocatechol violet (183).…”

Section: Metallic Ions and Simple Anionsmentioning

confidence: 99%

Pharmaceuticals

Slack¹,

Mader²

1959

Anal. Chem.

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“…Colorimetric procedures for zirconium use Alizarin Red S (230), SPADNS (22), the arsenazo reagent (365), and pyrocatechol violet (183).…”

Section: Metallic Ions and Simple Anionsmentioning

confidence: 99%

Pharmaceuticals

Slack¹,

Mader²

1959

Anal. Chem.

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“…In this method the hafnium-reagent complex precipitated after 15 min, if it is allowed to stand in the aqueous solution. Other reagents proposed for the photometric determination include methyl thymol blue (3), stilbazo (7), and 4,5-dihydroxy-3-[(4-sulfophenyl)azo]-2,7-naphthalenedisulfonic acid trisodium salt (SPADNS) (14).…”

mentioning

confidence: 99%

Spectrophotometric determination of zirconium and hafnium with 4-(2-pyridylazo)resorcinol

Kalyanaraman¹,

Fukasawa²

1983

Anal. Chem.

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Reaction behavior of zirconium and hafnium with 4-(2pyrldylazo)resorcinol Is established under various conditions. Optimum conditions for a very sensitive spectrophotometric procedure are outlined for the determination of zirconium and hafnium. Zirconium and hafnium react quantitatively with the reagent In alkaline pH from 8 to 9.2 and 8 to 9.8, respectively, to form 1:2 water-soluble complexes. The molar absorptivity for zirconium and hafnium Is 66 000 and 77 400, respectively. The order of addition of the reagent, metal Ion, and buffer solution Is evaluated. It Is concluded that both zirconium and hafnium solutions must be maintained at higher acidities to react quantitatively with the reagent. A number of foreign Ions are tested for their Interference and the use of masking agents and selective extractive agents Is outlined. The relative standard deviations are ±0.5 % and ±0.7 for the determination of 30 pq of zirconium and 40 pg of hafnium, respectively.

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“…Arsenazo is a chromotropic acid derivative, similar in some of its properties to other chromotropic acid derivatives that have recently found analytical use. Banerjee used p-sulfophenylazochromotropic acid (SPA-DA'S) as an indicator in the direct EDTA titration of zirconium (4) and thorium (5) and for the spectrophotometric determination or thorium, zirconium, and fluoride (2,8). Datta used psulfonaphthylazochromotropic acid (SNADXS) and some related compounds for similar purposes (6).…”

mentioning

confidence: 99%