Ultraviolet Spectrophotometric Determination of Sulfate, Chloride, and Fluoride with Chloranilic Acid

Bertolacini, Ralph; Barney, J. E.

doi:10.1021/ac60134a012

Cited by 109 publications

(26 citation statements)

References 15 publications

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“…As a check on the above turbidimetric method, we also analyzed selected samples for S04 using the more involved barium chloranilate technique (Bertolacini and Barney, 1958;Shafer, 1967) Chloride concentrations were determined potentiometrically using an Orion solid-state Cl electrode and an Orion double-junction reference electrode with I M KN0 3 filling solution in the outer chamber. Standards containing 5-50 mg CI I I were prepared from a 1000 mg Cl/I stock solution of "Specpure" NaCI (Johnson, Mathey and Co., Ltd).…”

Section: Sui/ate and Chloride Analysesmentioning

confidence: 99%

Chemical Fractionation of Brine in the McMurdo Ice Shelf, Antarctica

1986

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ABSTRACT. During the austral summers of 1976-77 and 1978-79, several ice cores were taken from the McMurdo Ice Shelf brine zone to investigate its thermal, physical, and chemical properties. This brine zone consists of a series of superimposed brine layers (waves) that originate at the seaward edge of the ice shelf and migrate at various rates, depending on their age and position in the ice shelf. The brine in these layers becomes increasingly concentrated as the waves migrate inland through the permeable ice-shelf firn. Chemical analyses of brine samples from the youngest (uppermost) brine wave show that, except for the advancing front, it contains sea saIts in normal sea-water proportions. Further inland, deeper and older brine layers, though highly saline (S > 200%0), are severely depleted in SO.2-, with the SO.2-/Na+ ratio being an order of magnitude less than that of normal sea-water. Consideration of the solubility of alternative salts, together with analyses of Na+, K+, Ca 2 +, Mg2+, SO /-, and cr concentrations, shows that the sulfate depletion is probably due to selective precipitation of mirabilite, Na 2 SO •. IOH 2 0. The location of the inland boundary of brine penetration is closely related to the depth at which the brine encounters the firn/ice transition. However, a small but measureable migration of brine is still occurring in otherwise impermeable ice; this is attributed to eutectic dissolution of the ice by concentrated brine as it moves into deeper and warmer parts of the McMurdo Ice Shelf. RESUME.

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Section: Sui/ate and Chloride Analysesmentioning

confidence: 99%

Chemical Fractionation of Brine in the McMurdo Ice Shelf, Antarctica

1986

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“…1: the maximum absorption wavelength was 332 nm. Since the molar absorption of chloranilate at 310 nm (its isobestic point) is less than that at 332nm (Bertolacini and Barney, 1958;Schafer, 1967), measurements were performed at 332 nm.…”

Section: Absorption Curve Of Chloranilatementioning

confidence: 99%

Indirect spectrophotometric determination of phytic acid with zinc chloranilate

Kamaya

Furuki

Nagashima

et al. 1995

Phytochemical Analysis

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The indirect spectrophotometric determination of phytic acid with zinc chloranilate has been studied. The method, based on the measurement of chloranilate released by the replacement reaction of phytic acid and zinc chloranilate, could be used to determine phytic acid in the range of 0.3 to 3.0 × 10−5 M. The method showed high reproducibility for measuring phytate in foods, and was more rapid than conventional methods.

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“…Metal compounds of the chloranilic acid are almost insoluble in cold water and the color bleaching that accompanies its precipitations have been used as the basis of a colorimetric methods for estimation of these metals [20,21]. Studies on CAA and its metal complexes have been reported.…”

Section: Introductionmentioning

confidence: 99%

Simple and Selective Determination of Zr (IV) with 1,4-dichloro-2, 5-dihydroxyquinone in a Micellar Solution of Cetylpyridenium Chloride by Zero and Second-Derivative Spectrophotometry

Elsayed¹,

Awwad²,

Hamed³

et al. 2016

Eurasian J Anal Chem

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A rapid, simple, selective, and sensitive method for trace determination of Zr (IV) has been developed based on the reaction of 1,4-dichloro-2,5-dihydroxyquinone in a hydrochloric acid medium to form a colored complex which is rendered water soluble by the micellar action of cetylpyridinium chloride (CPC) and measured at λmax 331 nm. Beer's law is obeyed in the concentration range 0-5 µg.ml -1 . The molar absorptivity of the complex, є was found to be 1.6 ×10 4 L.mol -1 cm -1 and Sandell's sensitivity was found to be 5.7 ng.cm -2 . A method for determination of Zr (IV) by second derivative spectrophtometry has also been proposed. The detection limit of Zr (IV) in the derivative method is 6 times lower than that of the zero order method, which shows the higher sensitivity of the derivative method. The method has been applied for determination of Zr (IV) in various samples, and satisfactory results have been obtained.

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Ultraviolet Spectrophotometric Determination of Sulfate, Chloride, and Fluoride with Chloranilic Acid

Cited by 109 publications

References 15 publications

Chemical Fractionation of Brine in the McMurdo Ice Shelf, Antarctica

Chemical Fractionation of Brine in the McMurdo Ice Shelf, Antarctica

Indirect spectrophotometric determination of phytic acid with zinc chloranilate

Simple and Selective Determination of Zr (IV) with 1,4-dichloro-2, 5-dihydroxyquinone in a Micellar Solution of Cetylpyridenium Chloride by Zero and Second-Derivative Spectrophotometry

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