title: A rapid field detection method for arsenic in drinking water.
abstract: In this study, a rapid colorimetric method for arsenic detection was developed. Different reagents containing magnesium turnings in combination with a series of acids were tested for arsine generation. The arsine was then allowed to react with auric chloride on Whatman filter paper No. 3, which in turn changed color. The detection time and detection limit were measured for each acid. Oxalic acid was found to be the most appropriate acid among all the acids used for detection in this study. It took 10 min to detect 10 ppb arsenic concentration and only 1 min to detect concentrations higher than 50 ppb. This method thus reduced the detection time for arsenic and has the potential to develop better field kit.
authors.affiliation: Defence Research & Development Establishment, Gwalior, India.
authors.forename: Anuradha
authors.initials: A
authors.lastname: Baghel
authors.forename: Beer
authors.initials: B
authors.lastname: Singh
authors.forename: Pratibha
authors.initials: P
authors.lastname: Pandey
authors.forename: K
authors.initials: K
authors.lastname: Sekhar
mesh_terms: D000143:Acids / Q000737:chemistry*; D001151:Arsenic / Q000032:analysis*; D003116:Color; D003124:Colorimetry / Q000379:methods*; D004784:Environmental Monitoring / Q000191:economics / Q000379:methods*; D005374:Filtration; D017612:Gold Compounds / Q000737:chemistry; D017616:Magnesium Compounds / Q000737:chemistry*; D019815:Oxalic Acid / Q000737:chemistry; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013054:Spectrophotometry, Atomic / Q000379:methods; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014881:Water Supply / Q000032:analysis*
chemical_list: D000143:Acids; D017612:Gold Compounds; D017616:Magnesium Compounds; D014874:Water Pollutants, Chemical; C038016:gold chloride; D019815:Oxalic Acid; D001151:Arsenic