Flame Photometric Determination of Phosphate

Dippel, W.A.; Bricker, Clark E.; Furman, N. H.

doi:10.1021/ac60087a038

Cited by 41 publications

(8 citation statements)

References 9 publications

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“…Because of the inherent instability (7) of dichloroborane, vacuum fractionation methods of analysis for samples containing dichloroborane are inadequate. Wet chemical methods which determine chlorine, boron, and active hydrogen, inasmuch as they can be made accurate, are time-consuming and are not well suited for the direct determination of each component.…”

Section: Discussionmentioning

confidence: 99%

“…However, when measurements are made by the background technique, at 422. 7 and 420.0 µ, the enhancement is due to an increase in the background contributed by the phosphoric acid. The net emission of the calcium is depressed as it is at the low concentrations of phosphate.…”

Section: + By Ay + Bxmentioning

confidence: 94%

“…The action of high concentrations of titanium is very similar to that noted for high concentrations of phosphoric acid and emphasizes the need for background corrections. High mole concentrations of phosphoric acid enhance the emission of calcium (7). However, when measurements are made by the background technique, at 422.…”

Section: + By Ay + Bxmentioning

confidence: 99%

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Releasing Effects in Flame Photometry. Determination of Calcium

Dinnin¹

1960

Anal. Chem.

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Strontium, lanthanum, neodymium, samarium, and yttrium completely release the flame emission of calcium from the depressive effects of sulfate, phosphate, and alumínate. Magnesium, beryllium, barium, and scandium release most of the calcium emission.These cations, when present in high concentration, preferentially form compounds with the depressing anions when the solution is evaporated rapidly in the flame. The mechanism of the interference and releasing effects is

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Section: Discussionmentioning

confidence: 99%

Section: + By Ay + Bxmentioning

confidence: 94%

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Releasing Effects in Flame Photometry. Determination of Calcium

Dinnin¹

1960

Anal. Chem.

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“…Furthermore, because in a certain concentration range the degree of interference is nearly proportional to the phosphate concentration, the effect can even be used for estimating the amount of phosphate in solutions with constant Ca concentration. 8 In the present paper the interference of the PO molecular absorption by Ca and Mg in an air-acetylene flame, as well as methods for the elimination of the effect, are investigated.…”

Section: Introductionmentioning

confidence: 99%

The influence of calcium and magnesium on the phosphorus monoxide molecular absorption signal in the determination of phosphorus using a continuum source absorption spectrometer and an air–acetylene flame

Huang¹,

Becker‐Ross²,

Florek³

et al. 2006

J. Anal. At. Spectrom.

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The determination of P by means of evaluation of PO molecular absorption bands in the airacetylene flame is an uncomplicated, reliable, and rapid analytical method, as stated by the authors in a preceding paper. However, the presence of Mg, and especially of Ca, in the sample solution causes strong suppression of the PO absorption. This is due to the formation of calcium and magnesium phosphates, which are thermally so stable that they are not decomposed in a medium temperature air-acetylene flame. Fortunately, the suppression effect can be completely eliminated by the addition of Ti to the sample, whereby titanates of Ca and Mg are formed in the flame. As these titanates are thermally more stable than the corresponding phosphates, the phosphate is released. The analytical performance of the method was verified by analyses of standard reference materials containing high concentrations of Ca. Good precision and accuracy were achieved.

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“…SEVERAL authors (1-3, 5) have determined phosphorus by flame photometry. Often the suppression of the emission from some cation is correlated with phosphorus content (1,3,5). Gilbert (4) used an air-hydrogen-alcohol flame to excite the chemiluminescence phosphorus spectrum.…”

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confidence: 99%