Elimination of interference from aluminium in the determination of total iron in soils and plant materials using 1,10-phenanthroline reagent

Jayman, T. C. Z.; Sivasubramaniam, S.; Wijedasa, M. A.

doi:10.1039/an9750000716

Cited by 7 publications

(2 citation statements)

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“…Jayman et al 68 have pointed out that the iron and the aluminum complexes of phenanthroline exhibit identical absorption characteristics. Attempts to mask aluminum to facilitate the determination of iron were unsuccessful.…”

Section: Spectrophotometric Methodsmentioning

confidence: 98%

Determination of Metals in Soils

Crompton

2015

Determination of Metals in Natural Waters, Sediments and Soils

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Section: Spectrophotometric Methodsmentioning

confidence: 98%

Determination of Metals in Soils

Crompton

2015

Determination of Metals in Natural Waters, Sediments and Soils

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“…The soils were filtered into 250 ml volumetric flasks and the soil and bottles washed repeatedly with hot demineralised water. After cooling, the contents were made to the mark and suitable aliquots used to determine P by the Molybdenum Blue method of Fogg and Wilkin~on,~ Fe by the revised o-phenanthroline method of Jayman et al 5 and A1 by the method of Jayman et aL6…”

Section: Soil Incubation Experimentsmentioning

confidence: 99%

Release of bound iron and aluminium from soils by the root exudates of tea (camellia sinensis) plants

Jayman

Sivasubramaniam

1975

J Sci Food Agric

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Root exudate of young tea plants contained appreciable quantities of malic acid. Malic acid was capable of solubilising P, Fe and A1 from rock phosphate fertiliser. Tea soils incubated with added malic acid released appreciable quantities of P, Fe and Al. In tea soils where most of the P added as the rock phosphate is immobilised as the iron and aluminium phosphates, malic acid may prove to be useful in chelating these elements and so releasing the phosphates for utilisation by the tea plant. IntroductonTea plants thrive on acid soils and most of the soils in which tea is grown are predominantly kaolinitic. Field experiments have shown that tea plants did not respond to applications of rock phosphate beyond 33.6 kg P~O~/hectare per annum. Subsequent fractionation of the soil for phosphorus carried out by the method of Chang and Jackson1 indicated that most of the phosphorus applied as the rock phosphate fertiliser was fixed as the relatively insoluble iron and aluminium phosphates.Many investigators have reported that certain organic substances and particularly hydroxylated organic acids normally produced in soils by the action of microorganisms are effective agents in releasing phosphates that are rendered insoluble as the iron and aluminium phosphates. Garretsen2 showed that insoluble phosphates were solubilised in the rhizosphere either by the action of microorganisms or plant root exudates.Malic acid has been detected in tea roots.3 The object of this study was to investigate whether malic acid was capable of releasing the phosphates rendered insoluble as the iron and aluminium phosphates so that the plants can utilise the phosphates so released. Materials and methodsOne year old tea plants of the clone TRI 2025 established in polythene bags were used. The roots were cleaned and washed thoroughly with demineralised water. The plants with their root systems fully immersed were allowed to remain in 250 ml Erlenmeyer flasks containing 100 ml demineralised water for 48 h in the laboratory at room temperature (23°C). At the end of this period, the plants were removed and the water 1895

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Spectrophotometric Determination of Iron and Cobalt in Super Alloys

Tsai¹,

Jong²

1989

J Chinese Chemical Soc

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The quantitative analysis of iron and cobalt in super alloys has been studied. 1,‐10‐Phenanthroline and nitroso‐R salt provide the chromophores for iron(II) and cobalt(II), respectively. The possibility of applying these photometric methods to a relatively complex substance, such as a super alloy, has been evaluated on the bases of precision and accuracy. The absorbance characteristics of metal complexes and the possible interference from foreign ions have also been carefully investigated. The presence of a high concentration of Ni results in a reducation of the amount of 1,10‐phenanthroline available for the formation of ferroin complexes while Mo does not have this effect. The analytical methods have been applied to the super alloys, Inconel 718, Hastelloy X, and Inconel X‐750. The modified 1,10‐phenanthroline photometric method and the standard nitroso‐R salt photometric method give high accuracy and good precision. This illustrates the analytical applicability of these reagents to super alloys.

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Elimination of interference from aluminium in the determination of total iron in soils and plant materials using 1,10-phenanthroline reagent

Cited by 7 publications

References 0 publications

Determination of Metals in Soils

Determination of Metals in Soils

Release of bound iron and aluminium from soils by the root exudates of tea (camellia sinensis) plants

Spectrophotometric Determination of Iron and Cobalt in Super Alloys

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