graecum were expressed as microgram of pyrocatechol
equivalents (PEs), were determined with Folin-Ciocalteu reagent (FCR) according to the method of Slinkard and Singleton .
It may also act as a mild reducing agent due to its pyrocatechol
Content of phenols and flavonoids in extracts was estimated as pyrocatechol
equivalent, and as rutin equivalent, respectively.
22 [micro]m millipore filter extract) by the pyrocatechol
violet (PCV) method (Kerven et al.
Phytochemical studies of the plant reveals that it contains the constituents lilke arjunic acid, terminic acid, glycosides, plant flavones, tannins, oligomeric proanthocyanidins, pyrocatechol
tannins and glucotannic acid, together with sodium, calcium salts, magnesium salts, and phytosterols (Kandil and Nassar, 1998; Bharani et al.
The discrepancy could be due to the difference in Al analysis methods, ICP-AES in this work, pyrocatechol
violet in that of Noble et al.
Wilson AD, Sergeant GA (1963) The colorimetric determination of aluminium in minerals by pyrocatechol
30% of that measured by the more aggressive reagent pyrocatechol
violet (Powell 1998).
violet (PCV) and aluminon (60 s) (Kerven et al.
2] shaken end-over-end for 2 h were analysed for Al using pyrocatechol
violet based on the method of Dougan and Wilson (1974) and for Ca, Mg, K, and Na by flame atomic absorption spectrometry after dilution with 1000 ppm Cs as CsCl in 0.
Royset O (1986) Flow-injection spectrophotometric determination of aluminium in water with pyrocatechol
0, 24 h) by a 30-s reaction with the colorimetric reagent pyrocatechol
violet, PCV, in a flow injection analysis (FIA) manifold (Royset 1986).