Solid phase preconcentration-Fourier transform infrared spectrometric determination of carbaryl and 1-naphthol

✍ Scribed by Yasmina Daghbouche; Salvador Garrigues; Miguel de la Guardia

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 799 KB
• Volume: 314
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(95)00276-6

✦ Synopsis

An analytical procedure has been developed for the simultaneous determination of carbaryl and 1-naphthol in water samples by means of in-field sampling and preconcentration on C,, solid phase cartridges which, after drying are eluted on-line with a carrier flow of chloroform; carbaryl and 1-naphthol are determined by Fourier transform infrared spectrometry. Carbaryl is determined directly from the peak area of the flow injection absorbance versus time recordings, measured at 1741 cm-' with a baseline correction established at 1875 cm-'. For 1-naphthol the peak area values were measured from the first order derivative peak, obtained between the peak at 1280 cm-t and the valley at 1272 cm-' which correspond to the derivative spectrum of the absorbance band at 1276 cm-'. Measurements carried out by batch elution of the preconcentrated solutions provided detection limits of 0.36 mg 1-l for carbaryl and 1.6 mg 1-l for 1-naphthol for a sample volume of 100 ml.