15]N isotopic dilution over the 24-h incubation period was not sufficient to estimate gross N mineralisation.
15]N isotopic dilution technique enabled gross N mineralisation to be measured over short incubation periods, thus allowing the dynamic nature of the process to be studied.
There is clearly a need to investigate some of the factors discussed above that may compound the determination or interpretation of the flux rates derived from the isotopic dilution method.
Nevertheless, for dry soils and soils with a low water retention capacity, the results obtained by the isotopic dilution method, involving the addition of tracer solution, should be interpreted with caution.
As already mentioned, where the isotopically labeled form of MMA was available, measurements were made by isotopic dilution
LGC was asked to provide an independent reference value for the proficiency testing samples using Inductively Coupled Plasma Mass Spectrometry (ICP-MS) with isotopic dilution
(IDMS), which revealed a bias of over 20% in the consensus value.
Hutchinson JL Young SD, McGrath SP, West HM, Black CR, Baker AJ (2000) Determining uptake of 'non-labile' soil cadmium by Thlaspi caerulescens using isotopic dilution
Two isotopic dilution
procedures have predominated studies examining the phytoavailablility of soil elements and, depending upon the matrix sampled, have been designated as E or L values.
In contrast, Gabler and Hahr (2001) showed that for a number of heavy metals including Cd, labile Cd measured by isotopic dilution
using stable isotopes produced values that were very comparable with the amount of Cd extracted using 0.
Tran TS, Fardeau JC, Giroux M (1988) Effects of soil properties on plant-available phosphorus determined by the isotopic dilution
The isotopic dilution
technique has been widely employed for estimating the total available pool of P in soils, often termed the `E-value' (e.
15]N isotopic dilution
(Kirkham and Bartholomew 1954).