A simple accurate and reproducible spectrophotometric method was established for the estimation of Cilastazol based on the formation of condensation product. The method is based on the formation of yellow colored chromogen, when the drug reacts with p-Dimethylaminobenzaldehyde (PDAB). The colored species has an absorption maximum at 425 nm and obeys Beer's law in the concentration range of 6-10...

HAAS and HILL [1925, 1] have recently directed attention to a chromogen of considerable interest which escapes from the plasmolysed cells of Mercurialis perennis. If the coarsely divided tissue be steeped, anaerobically, in chloroform water for a short time, there results an extract which, on exposure to oxygen, assumes first a rich blue and then a yellow-brown colour. These investigators [1925...

A number of chromogens have been proposed in the past. In the glucose oxidase “GOD-Perid”1 method, the subject of study in this paper, ABTS is used as the chromogen (6). Unfortunately, the glucose oxmdase methods are not free of interference from other substances, uric acid being one. Here, I examine each reaction step of the GOD-Perid method, discuss possible mechanisms of interference by uric...

Chalcones are open analogues of flavonoids and give bright red to purple colours with different reagents which can be used to distinguish them from other flavonoids such as flavanones, flavones, aurones etc. Studies show that the bathochromic shift arises due to the formation of carbonium ion at the carbonyl group (>C = O) of the chromogen (ArCOCH = CHAr) as an intermediate which produces deepe...

Manual and automated methods for the determination of blood glucose have been devised using an oxidase/peroxidase system, with dl adrenaline, a non-carcinogen, as oxygen acceptor. The manual technique employs a stable single solution protein precipitant and the other reagents used are also stable. The automated methods are operated at 40/hr sample speed and washover between samples, over a very...

In this study, Copper oxide as a good and inexpensive adsorbent has been introduced and used for the removal of erythrosine and red carmoisine dyes from several water solutions successfully. The effect of various parameters such as pH, dye concentration, amount of adsorbent, contact time and temperature on removal processing was investigated. Adsorption isothermal data could be interpreted by t...

In this study , Copper oxide as a good and inexpensive adsorbent has been introduced and used for the removal of erythrosine and red carmoisine dyes from several water solutions successfully. The effect of various parameters such as pH, dye concentration, amount of adsorbent, contact time and temperature on removal processing was investigated. Adsorption isothermal data could be interpreted by ...

In this study Soure orange skin as a good, natural and inexpensive adsorbent has been introduced and used for the removal of Erythrosine and red Carmoisine dyes from several water solutions successfully. The effect of various parameters such as pH, dye concentration, amount of adsorbent, contact time and temperature on removal processing was investigated. Adsorption isothermal data could be int...