Error message

  • Notice: Undefined property: stdClass::$uri in theme_file_link() (line 751 of /var/www/scholar/modules/file/file.module).
  • Notice: Undefined property: stdClass::$uri in theme_file_link() (line 771 of /var/www/scholar/modules/file/file.module).
  • Notice: Undefined property: stdClass::$filemime in theme_file_icon() (line 817 of /var/www/scholar/modules/file/file.module).
  • Notice: Undefined property: stdClass::$filemime in file_icon_path() (line 861 of /var/www/scholar/modules/file/file.module).
  • Notice: Undefined property: stdClass::$filemime in file_icon_map() (line 904 of /var/www/scholar/modules/file/file.module).
  • Notice: Undefined property: stdClass::$filemime in file_icon_path() (line 876 of /var/www/scholar/modules/file/file.module).
  • Notice: Undefined property: stdClass::$filemime in file_icon_path() (line 876 of /var/www/scholar/modules/file/file.module).
  • Notice: Undefined property: stdClass::$filemime in file_icon_path() (line 876 of /var/www/scholar/modules/file/file.module).
  • Notice: Undefined property: stdClass::$filemime in file_icon_path() (line 876 of /var/www/scholar/modules/file/file.module).
  • Notice: Undefined property: stdClass::$filemime in theme_file_link() (line 783 of /var/www/scholar/modules/file/file.module).
  • Notice: Undefined property: stdClass::$filesize in theme_file_link() (line 783 of /var/www/scholar/modules/file/file.module).
  • Notice: Undefined property: stdClass::$filename in theme_file_link() (line 789 of /var/www/scholar/modules/file/file.module).

Adsorptive Cathodic Stripping Voltammetric Studies of Emodin

Journal: 
An-Najah University Journal for Research - Natural Sciences - Volume 13, Issue 1, 1999
Start Page: 
57
End Page: 
66
Received: 
Tuesday, September 22, 1998
Accepted: 
Tuesday, August 31, 1999
Authors: 
Mohammad A. Hannoun
Abstract: 

A differential pulse cathodic stripping voltammetric (DP-CSV) method for determination of emodin in Britton- Robinson buffer (pH2) at a hanging mercury drop electrode (HMIDE) is described. The method is based on measuring the reductive peak height at —0.25V vs. Ag/AgCl reference electrode. The linear relationship between the peak current and emodin concentration allowed the voltarnmetric determination of emodin over a wide concentration range 1.0 X 10-2 —2.5 X10-6 M, with a relative standard deviation of 3.3% (10 determinations at 1 X 10-2 M). Adsorption of emodin at HMDE enabled a detection limit of 2X10-1°M after 3 min accumulation at 0.0V. The applicability of the suggested method was found to be suitable for the determination of emodin in roots, stems and leaves of Rumex cyprius plant.

Full Text: 
Binary Data