In forensic ballistics, gunshot residue (GSR) particles can be detected using screening or presumptive tests which are mainly focused on the chromophoric reaction. Most serve as an initial indication for a investigator at crime scene before instrumental analysis definitive identification. The methods known to convenient, have fast analysis, and minimal preparation. GSR well-known method of dete...

The title compound is a new pyrazolone derivative which was synthesized starting from p-sulphophenyl-3-methyl-5-pyrazolone (1) by nitrosation at low temperature to afford the corresponding p-sulphophenyl-3-methyl-4-nitroso-5-pyrazolone can exist both in nitroso (2a) and oxime tautomeric forms (2b). Reduction of latter using zinc with hydrochloric acid furnished 4-amino-p-sulphophenyl-3-methyl-5...

New simple sensitive spectrophotometric methods are developed for the estimation of Sulfadoxine (SFD) in pure and pharmaceutical formulations. The first method includes a conversion primary amine to azo-dye by reacting sulfadoxine with sodium nitrite hydrochloric acid followed coupling with4-methoxyphenol alkaline medium obtain stable reddish-orange colored dye at λmax495nm. Concentration range...