Determination of soluble nitrates, sulphates and phosphates in mixed artificial fertilizers by isotachophoresis

Boček, Petr; Kaplanová, Božena; Deml, Mirko; Janák, J.

doi:10.1135/cccc19782707

Cited by 15 publications

(6 citation statements)

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“…2a). Either the enrichment of the BGE with 2 mM Ca++ cations [12] (Fig. 2b) or the increase of the Tris concentration (Fig.…”

Section: Anionsmentioning

confidence: 99%

“…Precipitation of sulfate anion by Ca++ cation and formation of ionic pairs of inorganic anions with the Tris cation are the probable mechanisms. In isotachophoretic separation of nitrate and sulfate anions, addition of Ca++ ions to the electrolyte system evokes deterioration of the shape of the sulfate zone [12]; in distinction with it, a perfectly sharp sulfate peak results at capillary zone electrophoresis condi- CcJ (mM) Figure 3. Calibration curves of (1) chloride, (2) nitrate and (3) sulfate anions in 1 mM Tris adjusted with acetic acid to pH 6.6 and enriched with 2 mM Ca++ cations, giving peak heights h, as the function of analyte concentration [c].…”

Section: Anionsmentioning

confidence: 99%

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Capillary zone electrophoresis with indirect photometric detection in the visible range

1994

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Sensitivity and applicability of commonly used indirect photometric detection in the UV region can be adversely affected by the absorption of the UV light by detected solutes and/or by matrix constituents migrating with them. If the visible light is exploited instead of the UV light, both these disadvantages may be for the most part eliminated, and, moreover, the indirect photometric detection will extend its versatility and sensitivity. Prospects as well as main problems of the approach were tested using inorganic ions as analytes. If organic dyes with a molar light absorption coefficient of the order of 10(6) mol-1 L m-1 was selected as the light-absorbing constituents of the background electrolyte, detection sensitivity comparable with the best reported results was reached for anions; for cations, the detection limit was even lower by two orders of magnitude.

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“…2a). Either the enrichment of the BGE with 2 mM Ca++ cations [12] (Fig. 2b) or the increase of the Tris concentration (Fig.…”

Section: Anionsmentioning

confidence: 99%

Section: Anionsmentioning

confidence: 99%

Capillary zone electrophoresis with indirect photometric detection in the visible range

1994

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“…The leading, terminating and sample ions all have net charges of the same sign. 1975;Kjellin & Hallander, 1979), organic acids in food (Baldesten et al, 1978) and the Krebs cycle (BoEek et aL, 1976), tissue metabolites (Sjodin et al, 1975) artificial fertilizers (BoEek et aL, 1978) and of protein-drug interactions (Sj8dahl& Hjalmarsson, 1978). In addition, detection by U.V.…”

mentioning

confidence: 99%

“…As main advantages, fast analysis time, little or no pretreatment, high resolving power and simple and accurate quantification have been mentioned (Sjodin el al., 1975);Sollenberg & Baldesten, 1977;BoEek et aL, 1976BoEek et aL, , 1978Baldesten et aL, 1978;Schmidt et aL. As main advantages, fast analysis time, little or no pretreatment, high resolving power and simple and accurate quantification have been mentioned (Sjodin el al., 1975);Sollenberg & Baldesten, 1977;BoEek et aL, 1976BoEek et aL, , 1978Baldesten et aL, 1978;Schmidt et aL.…”

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confidence: 99%

ANALYTICAL ISOTACHOPHORESIS IN PEPTIDE CHEMISTRY: I. Analysis of Anions in Peptides*

Nispen¹,

Janssen²,

Goverde³

et al. 1981

International Journal of Peptide and Protein Research

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The application of analytical capillary, carrier-free isotachophoresis as a rapid method (approx. IO-15 min per run) for the simultaneous determination of anions present in peptides (as countenon, contaminating ion or peptide anion) is described. Only small amounts of material, approx. 0.1 -1.0 mg, are necessary to obtain information on the nature of the anion (qualitative) and o f the amount o f anion present (quantitative aspect).Key words: analytical capillary isotachophoresis; peptides; simultaneous qualitative and quantitative determination of anions.

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“…the available P205 determined. Bocek et al(23) used isotachophoresis to determine orthophosphate and diphosphate in liquid fertilizers. In a further study on this method, Bocek et al(24) used 0.005 M HC1 and 0.01 M histidine adjusted to pH 6 as the leading electrolyte solution and 0.01 M glutamic acid as the terminator solution.…”

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confidence: 99%

Fertilizers

Sweeney¹,

Gehrke²,

Rexroad³

1979

Anal. Chem.

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This review covers the literature reported from January 1, 1977, to December 31, 1978, and includes procedures recorded in readily available journals, in Chemical Abstracts, and in Fertilizer Abstracts (62). Some selectivity has been exercised to include only those procedures especially pertinent for direct application to fertilizers, easily adapted to fertilizers, or containing information related to research in fertilizer methodology. In the Literature Cited section of this review, Fertilizer Abstracts (62) are abbreviated as Fert. A.

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Determination of soluble nitrates, sulphates and phosphates in mixed artificial fertilizers by isotachophoresis

Cited by 15 publications

References 0 publications

Capillary zone electrophoresis with indirect photometric detection in the visible range

Capillary zone electrophoresis with indirect photometric detection in the visible range

ANALYTICAL ISOTACHOPHORESIS IN PEPTIDE CHEMISTRY: I. Analysis of Anions in Peptides*

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