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- W2048823306 abstract "In a recent attempt to establish the mineralogical residence of the fixed NH/sub 4//sup +/-N in oil shale samples, NH/sub 4//sup +/-containing minerals were concentrated by treating with dilute HCl to remove carbonates and with alkaline NaOCl (household bleach) to remove organic matter. When fixed NH/sub 4//sup +/-N and total-N were determined on a sample of spent shale from Fischer assay that had been treated with HCl and NaOCl (sample 781.5st), fixed NH/sub 4//sup +/-N was found to be 0.59% whereas total N was found to be only 0.15%. Clearly, not all of the fixed NH/sub 4//sup +/-N was extracted by the method for total N; therefore, a new method of analysis for total N content of oil shale was developed. Total N was determined by combining techniques for determining total N by sealed-tube digestion and for extracting fixed NH/sub 4//sup +/-N with HF. 6 references, 1 table." @default.
- W2048823306 created "2016-06-24" @default.
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- W2048823306 date "1986-06-01" @default.
- W2048823306 modified "2023-09-25" @default.
- W2048823306 title "Determination of total nitrogen in oil shale" @default.
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- W2048823306 doi "https://doi.org/10.1021/ac00298a068" @default.
- W2048823306 hasPublicationYear "1986" @default.
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