Flammenphotometrische Rubidium-Bestimmung

Freytag, H.

doi:10.1007/bf00445267

Z. Anal. Chem.

1952

DOI: 10.1007/bf00445267

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Flammenphotometrische Rubidium-Bestimmung

H. Freytag

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1955

1963

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“…and rubiduim (7800.2 and 7947.6 a,) are relatively close together, the Beckman DI; flame photometer or similar instrument doee not permit sufficirnt rePolution for the determination of rubidium in the presence of potassium. Freytag (9) reported considerable interference of potassium and lithium in determination of rubidium using a Zeiss flame photometer. Instruments with interference or absorption filters likewise do not give sufficient resolution to permit the determination of rubidium in the presence of potassium.…”

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Spectrographic Determination of Rubidium in Plant and Animal Tissues

Glendening¹,

Parrish²,

Schrenk³

1955

Anal. Chem.

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Because wet chemical methods generally are unsatisfactory, rubidium usually is determined hy spectrographic methods. Excitation of prepared samples of natural products by an electric arc or spark produce spectral lines of other elements that interfere with reading those of rubidium. This difficulty may be reduced by using flame excitation and a spectrograph of high dispersion. If the potassium concentration of the sample is high, as usually occurs in plant tissue, interference due to scattered radiation from intense potassium lines may be reduced by a mask, which prevents the energy from the potassum lines striking the spectrographic plate. Under proper conditions the method presented here is satisfactory for as low a concentration as 1 p.p.m. of rubidium in plant or animal tissue. The rubidium content of a number of human and animal foods was

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“…Flame rather than arc excitation has the advantage of producing spectral lines of the alkali metals along with relatively few lines of interfering elements (9,10). Cyanogen bands also are eliminated by flame excitation methods.…”

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confidence: 99%

Spectrographic Determination of Rubidium in Plant and Animal Tissues

Glendening¹,

Parrish²,

Schrenk³

1955

Anal. Chem.

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Beitrag zur Trennung der Alkaliionen am Kationenaustauscher. II. Die Trennung der Elemente Kalium, Rubidium und Caesium

Holzapfel

Ehrhardt

1963

J. Prakt. Chem.

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Es wurden Versuche zur Trennung der Ionen des Kaliums, Rubidiums und Caesiums mit Hilfe von Flußsäure als Elutionsmittel durchgeführt. Als Ionenaustauscherharz diente Wofatit KPS in der 16% vernetzten Form. Die Versuche wurden mit Säulen aus Polyäthylen durchgeführt, die eine Länge von 50 cm und einen Durchmesser von 1 cm besaßen. Im Eluat erschienen nacheinander Kalium, Rubidium und Caesium. Dabei konnte das Kalium vollständig vom Caesium getrennt werden, während die Trennungen Kalium/Rubidium und Rubidium/Caesium noch nicht quantitativ erfolgten. Es wird versucht, die erhaltenen Ergebnisse auf einfache Art zu deuten.

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Flammenphotometrische Rubidium-Bestimmung

Cited by 2 publications

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Spectrographic Determination of Rubidium in Plant and Animal Tissues

Spectrographic Determination of Rubidium in Plant and Animal Tissues

Beitrag zur Trennung der Alkaliionen am Kationenaustauscher. II. Die Trennung der Elemente Kalium, Rubidium und Caesium

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