Automatic continuous-flow determination of paraquat at the subnanogram per millilitre level

✍ Scribed by Manuel Agudo; Angel Ríos; Miguel Valcárcel

• Book ID: 102982250
• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 534 KB
• Volume: 281
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(93)85344-j

✦ Synopsis

A flow-through spectrophotometric sensor for the determination of paraquat at the nanogram per mililiitre level based on integration of preconcentration, reaction and detection in the flow-cell is proposed. The determination range achieved depends on the sample volume used. Thus, 250 ml of sample provides detection and determination limits of 0.11 and 0.44 ng ml-' paraquat, respectively. The relative standard deviation was k7.91 for 1.0 ng ml-' paraquat. The potential interference of other pesticides was studied, and the method was used to analyse water samples and study the adsorption of paraquat in different types of soils.