Determination of actinides in radioactive waste after separation on a single DGA resin column

Abstract A sensitive and specific gas-liquid chromatographic (GLC) method has been developed for determining low levels of clopidol in chicken tissues. Clopidol is extracted from the tissues with methanol, and cleaned up on an alumina column and an anion exchange resin column with 0.1% acetic acid–methanol as eluate. Clopidol is methylated with diazomethane, and then determined by GLC. 2,4-Dinitro-l-chlorobenzene is used as an internal standard. The method is applicable to levels as low as 2 ppb in chicken tissues. Recoveries of 2–20 ppb clopidol added to tissues averaged 87% for muscle, 84% for liver, 80% for kidney, and 76% for fat.

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Liquid Chromatographic Determination of Ergot Alkaloids in Wheat

Journal of AOAC INTERNATIONAL ◽

10.1093/jaoac/69.4.697 ◽

1986 ◽

Vol 69 (4) ◽

pp. 697-699

Author(s):

George M Ware ◽

Allen S Carman ◽

Octave J Francis ◽

Shia S Kuan

Keyword(s):

Mobile Phase ◽

Ergot Alkaloids ◽

Ammonium Phosphate ◽

Ammonium Hydroxide ◽

Chromatographic Determination ◽

Resin Column ◽

Fluorescence Detector ◽

Liquid Chromatographic Determination ◽

Liquid Chromatographic

Abstract A method is described for the determination of individual ergot alkaloids in wheat. The sample is extracted with ethyl acetate-4% ammonium hydroxide (100 + 10), and the extract is cleaned up by liquidliquid partition. The ergot alkaloids are resolved by liquid chromatography (LC), using a porous cross-linked polystyrene-divinylbenzene resin column and a mobile phase consisting of acetonitrile-0.05M dibasic ammonium phosphate (55 + 45) buffered at pH 10.0. The ergot alkaloids ergonovine, ergonovinine, ergotamine, ergotaminine, α-ergocryptine, α-ergocryptinine, ergocristine, and ergocristinine are separated by LC and detected with a fluorescence detector. Recovery of ergot alkaloids added to wheat at levels of 16-760 ng/g averaged 85.6% with a coefficient of variation of 11.1%.

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Investigation of Urtite as an Analog of Waste Slag from a Plasma Shaff Furnace

MRS Proceedings ◽

10.1557/proc-412-239 ◽

1995 ◽

Vol 412 ◽

Cited By ~ 1

Author(s):

S. A. Dmitriev ◽

S. V. Stefanovsky

Keyword(s):

Radioactive Waste ◽

Electron Probe ◽

Nepheline Syenite ◽

Shaft Furnace ◽

Alkali Feldspar ◽

Chemical Compositions ◽

Natural Analog ◽

First Approximation ◽

Geochemical Investigation

abstractMineralogical-geochemical investigation of a sample of nepheline syenite (urtite) as a natural analog of final radioactive waste form has been performed. The specimen of urtite consists of nepheline, alkali feldspar, pyroxene, sphene, apatite and minor magnetite and amphibole. As a first approximation, urtite simulates the mineral composition of waste slag produced in a plasma shaft furnace at SIA “Radon”. Determination of chemical compositions of the minerals by electron-probe microanalysis has shown that the main phases that hosted radionuclides and their geochemical analogs are as follows: nepheline (Rb and probably Cs), feldspar (Ba), sphene (Zr, Nb, REE, and actinides) and apatite (Sr, REE, and actinides).

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