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- W1990685009 abstract "A statistical comparison was made of three modified standard methods and a new rapid estimator for determining ammoniac-N in oil shale retort waters. The modified standard methods were (1) distillation/acidimetric titration (automated), (2) phenate colorimetry, and (3) glutamate dehydrogenase enzymatic analysis. The fourth method, reverse-phase fractionation-combustion/chemiluminescence (RPF-C/Cl), used a reverse-phase chromatographic technique to separate polar from nonpolar nitrogenous compounds; combustion/chemiluminescence was then used to determine total-N in the polar fraction as a rapid estimate of ammoniac-N. Ammoniac-N for 12 retort waters ranged from 1 to 33 g/L. Precision was best for the titrimetric and colorimetric methods (relative standard deviations 0.01) across all waters only when titrimetry was compared with enzymatic analysis. The RPF-C/CL method gave the most rapid estimate ofmore » ammonia and would be useful for spot monitoring or range finding for the other methods.« less" @default.
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- W1990685009 date "1986-06-01" @default.
- W1990685009 modified "2023-10-17" @default.
- W1990685009 title "Oil shale retort water ammonia determination by titrimetry, phenate colorimetry, enzymatic analysis, and chromatographic fractionation/chemiluminescence" @default.
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- W1990685009 doi "https://doi.org/10.1021/ac00298a064" @default.
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