Dosages en analyse minérale par extraction à l'aide de cations colorés

Ducret, Lucien; Drouillas, Michèle

doi:10.1016/0003-2670(59)80140-9

Cited by 26 publications

(4 citation statements)

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“…It is well known that molybdophosphate reacts with cationic dyes to form ion associates, which can be separated as a precipitate from an aqueous solution [5][6][7][8], or floated between an aqueous and an organic phase [9][10][11][12], and extracted into organic solvents [13][14][15][16][17][18][19]. Later, Motomizu et al reported the solvent extraction/spectrophotometric method for the sensitive determination of phosphate with Malachite Green (MG) as an ideal pairing ion [20]: the molar absorptivity of the ion associate in a mixture of toluene and 4-methylpentan-2-one (1:3 v/v) is 2.3 × 10 5 l mol −1 cm −1 with the small reagent blank of 0.05 at 630 nm.…”

Section: Introductionmentioning

confidence: 99%

Trace and ultratrace analysis methods for the determination of phosphorus by flow-injection techniques

Motomizu¹,

Li²

2005

Talanta

104

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Section: Introductionmentioning

confidence: 99%

Trace and ultratrace analysis methods for the determination of phosphorus by flow-injection techniques

Motomizu¹,

Li²

2005

Talanta

104

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“…Only a selected group of references are included. During this time reviews on fluorometric analysis have appeared in literature in other countries by Bartholomew (11), Holzbecker (84), and Titeica (195), and as applied to medicine by Weber and Valic (216).…”

Section: Generalmentioning

confidence: 99%

Extraction

Morrison¹,

Freiser²

1960

Anal. Chem.

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HE PRESENT REVIEW is closely T patterned after the previous one (240) and represents an extension and expansion of the subject of extraction which has been necessitated by the increased popularity of the technique in chemical analysis. As in the past, the emphasis is on the separation of inorganic-materials. This review surveys the literature from late 1957 to late 1959 and f d o m without overlapping the material presented in the previous review. W W S AND BOOKSThe book by i'dorrison and Freiser (24.2) still represents the only comprehensive treatment of extraction as applied to inorganic analysis. hZore recently their chapter in "Comprehensive Analytical Chemistry" (241) has served to present the ktest information in a rapidly developing area of analysis. An excellent book bv Iwantscheff (161) treats the use of dithizone in micro and trace analysis, and presents much useful information of this chelate extraction system. The new edition of Sandell's book (SOori) also gives increasing emphasis t o extraction methods. A collection of papers presented a t the A.S.T.M. symposium on "Solvent Extraction in the Analysis of Metals" has been published (338) and includes some of the more recent aspects of the subject. With regard to reviews, a number of articles on the use of extraction in analysis have appeared (14, ,966, 360) in addition t o the present series. It is particularly interesting t o note the recognition of the extraction method as a valuable technique in radiochemical separations, and a chapter has been included in the latest volume of "Annual Review of Nuclear Science" (106). Another review of extractions in radiochemical separations is that by Vdovenko (357'). The engineering aspects of the extraction technique continue to be reviemd in an excellent manner by Treybal in the series in Industrial and Ew'neering C h i s t r y (S@), and a new edition of the book by Alders (4) has been published. DCTRACTlON SYSTEMS Because of the greatly increasing number of extraction studies published each year, it hss been necessary to limit this section t o a representative sample of the various investigations of the distribution of metal complexes. These studies describe the extraction behavior of various elements under m e r e n t experimental conditions. Their value is (156) Waters, P. L., J . Sci. In&. 35, 41-6 (1958).

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“…It is known that PAMB and phosphomolybdate are anionic species and they form an ion pair with an organic cation such as a cationic dye and quaternary ammonium ions [12,13,14,15,16,17]. The ion pair, as well as PAMB itself, can be extracted with some organic solvents and can be also trapped effectively in a membrane filter by filtration [18,19].…”

Section: Introductionmentioning

confidence: 98%

A spot test for aqueous phosphate by color band formation

et al. 2002

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Phosphate is generally analyzed by color intensity of phosphoantimonylmolybdenum blue (PAMB): especially by a spot test based on spectrophotometric or visual determination. Visual determination is one of the simplest and most inexpensive methods; however, it is believed to be of low precision. In this work, we have developed an alternative phosphate spot test, where phosphate concentration is measured by the color band length of PAMB formed in a detection tube similar to a gas detection tube. The color band is formed by the entrapment of the hydrophobic ion pair of PAMB and quaternary ammonium ions in the column; we demonstrated that this color band length correlates quantitatively with the phosphate concentration. In order to optimize the measurement performance, systematic investigations have been carried out for various experimental parameters such as phosphate concentration, preparation conditions of the column packing material, the type of support material (either silica-gel or PVC), the solution feeding conditions (filtration or penetration), and volume of the sample solution. The effects from some co-existing components were also studied for the measurement of real samples. Determination of phosphate concentrations in actual wastewaters was successfully carried out by this method, indicating that the quantification range achievable was of 3-18 mg PO(4) L(-1) without dilution prior to the analysis. No interference was observed from suspended solid (SS) and organic pollutants (COD, TOC) during the wastewater analysis. Because of the simplicity and rapid processing of the samples (not requiring any special instruments) this newly developed method can be applied to the on-site analysis of wastewater.

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Dosages en analyse minérale par extraction à l'aide de cations colorés

Cited by 26 publications

References 0 publications

Trace and ultratrace analysis methods for the determination of phosphorus by flow-injection techniques

Trace and ultratrace analysis methods for the determination of phosphorus by flow-injection techniques

Extraction

A spot test for aqueous phosphate by color band formation

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