: Potassium permanganate in the Kjeldahl method for determination of nitrogen in organic substances. Nature (Lond.) 175 , 513–514 (1955).Beat, A. E.: Potassium permanganate in the Kjeldahl method for the determination of nitrogen in organic substances. Nature (Lond.) 175 , 513–514 (1955)...
1. The reliability of the Kjeldahl method for the determination of nitrogen in soils has been investigated using a range of soils containing from 0·03 to 2·7% nitrogen. 2. The same result was obtained when soil was analysed by a variety of Kjeldahl procedures which included methods known ...
One attractive method due to small sample-size requirements is carbon-hydrogen-nitrogen (CHN) gas analysis, an instrumental modification of the Dumas method of nitrogen analysis (e.g., ISO-IDF, 2002). This method has generated comparable results to the macro-Kjeldahl method for organic N in ...
American Standard Methods ASTM E258, "Standard Test Method for Total Nitrogen in Organic Materials by Modified Kjeldahl Method", 3pp. (1967).ASTM E 258-67 (Reapproved 1987). Standard test method for total nitrogen in organic materials by modified kjeldahl method. American Society for Testing a...
The precision of the proposed method was satisfactory for total N analysis of water samples, and the method appears adequate for estimation of total N in most water and waste water samples. 展开 关键词:Kjeldahl steam distillation nitrate organic N waste water ...
This procedure has been used to estimate nitrogen content in samples before and after Kjeldahl treatment. In the same samples, the N found for the untreated samples provided a good estimation of the N Kjeldahl. Sixty samples per hour can be analyzed, and the procedure can also be used for ...
Very low recovery of NH4+N was observed in total N determination of (NH4)2SO4 in KC1 solutions by a semimicro Kjeldahl method using permanganate and reduced iron to recover NO3 and NO2, whereas complete recovery was obtained in analysis of NH4+N in water, and of NO3N or NO2N in ...
The method has a range of 10–500 μg Nl-1 with good precision and accuracy.doi:10.1016/S0003-2670(01)83018-XOmarElkeiElsevier B.V.Analytica Chimica ActaELKEI O. (1976) - An automated method for the determination of low level Kjeldahl nitrogen in water and waste water. Anal. Chim. ...
There is an urgent need for suitable nitrogen nutrition models for Southwest China, which take into account nutritional differences at the cultivar level, to provide scientific guidance for cultivar-specific fertilizer applications during maize productio
The calculation of SREY was done as described by Bohra and Kumar (2015) and the yields of all non-rice crops were converted to rice equivalent yield using the equation given below for the estimation of SREY.Riceequivalentofnonricecropyield=Nonricecropyield(t/ha)×MSPofnon-ricecrop(INR/kg)...