It is based on the well-recognized ability of aluminum to form colourful complexes with organic compounds such as eriochrome cyanine R (3"-sulfo-3,3'-dimethyl-4-hydroxyfuchson-5,5'-dicarboxylic (ECR)) (Figure 1), catechol violet , or aluminon
Iron in the extract was determined colorimetrically using orthophenanthrolein and aluminium by aluminon
reagent (Page et al., 1982).
The aluminon method was selected; Al as Al[Cl.sub.3] was added to one-fifth modified Hoagland nutrient solution to give solutions with 0, 100, 200, and 300 [micro]M, and then the pH adjusted to 4.5.
Inorganic monomeric aluminum content ([micro]M) estimated by aluminon method Data are means [+ or -] s.e.
The chelating agents employed vary depending on the target metals, and they include 2, 5-dimercapto-1, 3, 4-thiadiazole (18), ammonium pyrrolidine dithiocarbamate and its analog (19), dimethyiglyoxime (9, 21) and aluminon (22).
(23.) Cha KW, Park CL and Park SH: Simultaneous determination of trace uranium(IV) and zinz(II) by adsorptive cathodic stripping voltammetry with aluminon ligand.
Most data on aluminum levels in wild plants are based on the aluminon test of Chenery (1948b), which is a semiquantitative analysis.
In these studies, the detection of a high aluminum content is based mainly on a semiquantitative test using an "aluminon" reagent (ammonium aurine tricarboxylate) applied to leaves of living or dried specimens from herbarium material.
1984), pyrocatechol violet (PCV) and aluminon (60 s) (Kerven et al.
The aluminon method is chosen because it alone, of the available methods, enables determination of the relatively high Al concentrations found in the soil solutions of some highly weathered, acid soils.
Attempts to determine these usually involve the use of chromophores such as aluminon
and PCV (Kerven et al.
The plant materials were dry-ashed at 550 [degrees] C and the ash was taken up in 0.05 m HCl solution and analysed for K and Na by flame emission spectrophotometry, Ca and Mg by atomic absorption spectrophotometry, P by the vanadomolybdate method (Jackson 1958), and Al by the aluminon
method (Jayman and Sivasubramaniam 1974).