Spectrometric determination of ammonium-nitrogen with quinol in aqueous medium
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چکیده
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Determination of total nitrogen in aqueous samples using persulfate digestion
Determination of total nitrogen in aqueous samples after potassium persulfate digestion compared favorably in both precision and nitrogen recovery with determinations obtained using Kjeldahl digestion. The determination of total nitrogen (TN = inorganic and organic fixed nitrogen) has largely depended either on acid Kjeldahl digestion ( cf. Strickland and Parsons 1972) or on photo-oxidation (Ar...
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A sensitive and selective extraction - spectrophotometric method for the determination of trace amounts of palladium is reported. The method is based on quantitative extraction of brownish tetrabutylammoium tetraiodopalladium (II) ion pair into a small valume of chloroform at pH 1.3-12.0, followed by spectrophotometric measurements. The Beer's law is obeyed over the range 0.02-1.09 <em...
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15 صفحه اولNitrogen Isotope Analysis of Ammonium and Glycine Method Development for Aqueous Solutions and Soil Extracts
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A relatively simple and rapid procedure for the measurement of free ammonium and the amides in plant extracts is described. The method was developed by combining a cation-exchange method for blood ammonia with a differential acid-hydrolysis procedure for asparagine and glutamine amide-nitrogen. The recovery of standard samples (100-400 mug of ammonium- or amide-nitrogen) of free ammonium, aspar...
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ژورنال
عنوان ژورنال: Global Journal of Pure and Applied Sciences
سال: 2004
ISSN: 1118-0579
DOI: 10.4314/gjpas.v9i4.16057