. In: Serup J, Jemec G (Eds.), In Vivo Examination of the Skin: A Handbook of Non-Invasive Methods.
Notwithstanding the increasing absolute difference between ICP and colourimetry
as soil P increases, the relative difference between the 2 analytical methods was greatest in soils with lower amounts of available P.
Dissolved reactive P was also determined on the filtered (<0.45 [micro]m) samples using colourimetry
. The pH, electrical conductivity (EC), and amount of suspended sediments (SS) were also determined on each runoff sample.
With a specific focus on digitally replicating the dynamic range and colourimetry
of film, ARRI developed the Alexa camera, which enables HDR delivery by undertaking an HDR colour grade of the original ARRIRAW or Log C material.
The total nitrogen concentration was determined by the Kjeldahl method, total phosphorus was determined by sulfuric digestion and colourimetry
, total potassium was determined by flame photometry and calcium and magnesium were determined by atomic absorption (Embrapa 2011).
Phosphorus was determined following nitric perchloric acid digestion using colourimetry
. The diameter of each grass tuft occurring within each 1-[m.sup.2] plot was measured following removal of above-ground biomass as a proxy for net primary productivity.
Sub-samples of each soil were ignited (500[degrees]C, 2h), the ignited and non-ignited soils were extracted with sulfuric acid (0.5 M [H.sub.2]S[O.sub.4]) and the concentration of orthophosphate in the acid extracts was determined by colourimetry
according to the method of Murphy and Riley (1962).
The acid extracts were analysed for Al and Fe by atomic absorption spectrometry (AAS), whereas Si was quantified in the alkaline extracts by colourimetry
The NMR-detected P concentrations were consistent with P concentrations determined by colourimetry
and ICP-OES analysis for all NaOH-EDTA extracts.
[R.sub.60]) in both the presence and absence of L-TRP was determined by colourimetry
. For this purpose, 20 mL of GPAM broth was added to 100-mL Erlenmeyer flasks, autoclaved (1.5kg/[cm.sup.2] pressure and 120[degrees]C for 20min.), and cooled.
The sodium bicarbonate method and Mo-Sb colourimetry
were used to measure soil available P (Bao 1999).
Water-soluble sulfate was determined turbidimetrically using flow injection analysis colourimetry
(Lachat QuickChem 8000).