Flow-injection spectrophotometric determination of molybdenum and vanadium with carminic acid in the presence of cetyltrimethylammonium bromide

Martı́nez-Lozano, Carmen; Pérez-Ruíz, Tomás; Paredes, Conceptión

doi:10.1007/bf01244360

Cited by 7 publications

(2 citation statements)

References 14 publications

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“…Besides, CA has been used as an analytical tool for the determination of metals and other chemical species [6][7][8]. In recent years, CA has focused the attention of a number of researchers, who have studied its photodegradation [9], fluorescence properties [10,11], acid-base behaviour [12] and photo-aging processes [13].…”

Section: Introductionmentioning

confidence: 99%

Surface-enhanced Raman scattering study of the anthraquinone red pigment carminic acid

Cañamares

Garcı́a-Ramos

Domingo

et al. 2006

Vibrational Spectroscopy

102

107

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Section: Introductionmentioning

confidence: 99%

Surface-enhanced Raman scattering study of the anthraquinone red pigment carminic acid

Cañamares

Garcı́a-Ramos

Domingo

et al. 2006

Vibrational Spectroscopy

102

107

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“…The peak height increased almost linearly with the increase in injected sample volume up to 200 ~tL and then gradually increased. In comparison with other FIA methods based on similar complex formation and spectrophotometric detection, the present FIA system offers an extreme improvement in the limit of detection, about 1/400, 1/100, and 1/20 of those using 4-(2-pyridylazo)resorcinol [16], carminic acid [17] and 1,10-phenanthroline [18], and is rather selective.…”

Section: Calibration Graph and Limit Of Detectionmentioning

confidence: 98%

2-(5-Nitro-2-Pyridylazo)-5-(N-Propyl-N-Sulfopropylamino)Phenol as a new analytical reagent for flow-injection spectrophotometric determination of trace vanadium(V)

Yamane

Yamaguchi

1998

Mikrochim Acta

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Abstract.A flow injection method using 2-(5-nitro-2-pyridylazo)-5-(N-propyl-N-sulfopropylamino)phenol-(Nitro-PAPS) as a new chromogenic reagent is presented for sensitive and rapid determination of vanadium. Nitro-PAPS reacts with vanadium(V) in weakly acidic medium to form a water soluble complex of molar absorptivity of 8.0 x 104L mo1-1 cm -~ at 592nm (maximum absorption wavelength), which permits the straightforward application of a flow injection system to the sensitive determination of vanadium. Under the optimum conditions established, a linear calibration graph was obtained in the range 1-120 ng mL -1 . The relative standard deviation for 60ngmL -I vanadium was 2.2% (n= 5) and the limit of detection was 1 ng mL -1. The sample throughput is about 40 h-1. Most inorganic and organic anions examined did not interfere even at concentrations of 3000-6000 times of vanadium. Interference from cobalt(II), copper(II) and nickel(II) at 200ngmL -1 levels can be overcome by the addition of N-(dithiocarboxy)sarcosine. The recoveries for each 20 and 10ngmL -t vanadium added to the river water were 98 and 97%, respectively.Key words: Nitro-PAPS, vanadium, spectrophotometry, FlA.It has been shown that heterocyclic azoderivatives provide highly sensitive chromogenic reagents for some heavy metals which form complexes having molar absorptivities approaching to 105L mol -I cm -1 [1-6]. 2-(5-Nitro-2-pyridylazo)-5-(N-propyl-N-sulfo-* To whom correspondence should be addressed propylamino)phenol(Nitro-PAPS) is a recently synthesized chromogenic reagent giving complexes of high molar absorptivity with metals and good water solubility of both the reagent and its metal complexes [7]. Water solubility of the reagent and its metal complex is one of the important requirements for its use in flow-injection analysis (FIA) which is a rapidly growing analytical technique. Despite of expectable high analytical potential, analytical studies using the Nitro-PAPS have been found only for zinc [8], copper [9] and iron [10,11] determinations to date. Recently we have studied the Nitro-PAPS applied to sensitive post-column reaction detection in ion chromatography of cadmium, lead, and manganese [12]. In addition, we have found that Nitro-PAPS forms a water soluble complex of molar absorptivity of 8.0• 104L mo1-1 cm -1 with vanadium in weak acidic media and thus has potential usefulness to be applied for spectrophotometric determination of vanadium in a FIA system. In the present work, potential analytical significance of such complex formation of Nitro-PAPS with vanadium was studied in detail and a FIA method based on its use is described for the determination of trace vanadium. It has been assumed that Nitro-PAPS ranks as one of the most sensitive chromogenic reagents known for V(V). Experimental Reagents and SolutionsUnless otherwise noted, all reagents were of analytical grade and were used as received. Nitro-PAPS stock solution (1.0x t0 3 M) was prepared by dissolving the reagent (Dojindo, Kumamoto) in

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Application of ternary and multicomponent complexes to spectrophotometric and spectrofluorimetric analysis of inorganics

Rao

Reddy

Pillai

1998

Talanta

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Flow-injection spectrophotometric determination of molybdenum and vanadium with carminic acid in the presence of cetyltrimethylammonium bromide

Cited by 7 publications

References 14 publications

Surface-enhanced Raman scattering study of the anthraquinone red pigment carminic acid

Surface-enhanced Raman scattering study of the anthraquinone red pigment carminic acid

2-(5-Nitro-2-Pyridylazo)-5-(N-Propyl-N-Sulfopropylamino)Phenol as a new analytical reagent for flow-injection spectrophotometric determination of trace vanadium(V)

Application of ternary and multicomponent complexes to spectrophotometric and spectrofluorimetric analysis of inorganics

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