title: Multi-reverse flow injection analysis integrated with multi-optical sensor for simultaneous determination of Mn(II), Fe(II), Cu(II) and Fe(III) in natural waters.
abstract: Multi-reverse flow injection analysis (Mr-FIA) integrated with multi-optical sensor was developed and optimized for the simultaneous determination of multi ions; Mn(II), Fe(II), Cu(II) and Fe(III) in water samples. The sample/standard solutions were propelled making use of a four channels peristaltic pump whereas 4 colorimetric reagents specific for the metal ions were separately injected in sample streams using multi-syringe pump. The color zones that formed in the individual mixing coils were then streamed into multi-channels spectrometer, which comprised of four flows through cell and four pairs of light emitting diode and photodiode, whereby signals were measured concurrently. The linearity range (along with detection limit, µgL-1) was 0.050-3.0(16), 0.30-2.0 (11), 0.050-1.0(12) and 0.10-1.0(50)mgL-1, for Mn(II), Fe(II), Cu(II) and Fe(III), respectively. In the interim, the correlation coefficients were 0.9924-0.9942. The percentages relative standard deviation was less than 3. The proposed system was applied successfully to determine targeted metal ions simultaneously in natural water with high sample throughput and low reagent consumption, thus it satisfies the criteria of Green Analytical Chemistry (GAC) and its goals.
authors.affiliation: Department of Chemistry and Innovative Green Chemistry Research Unit, Faculty of Science and Technology, Thammasat University, Pathum Thani 12120, Thailand. Electronic address: nyoungvises@hotmail.com.
authors.forename: Napaporn
authors.initials: N
authors.lastname: Youngvises
authors.affiliation: Department of Chemistry and Innovative Green Chemistry Research Unit, Faculty of Science and Technology, Thammasat University, Pathum Thani 12120, Thailand.
authors.forename: Kittigan
authors.initials: K
authors.lastname: Suwannasaroj
authors.affiliation: Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand.
authors.forename: Jaroon
authors.initials: J
authors.lastname: Jakmunee
authors.affiliation: Department of Chemistry, Faculty of Science, Taibah University, Prince Naif Road, AlMadeinah AlMunwaraha 42353, Saudi Arabia.
authors.forename: Awadh
authors.initials: A
authors.lastname: AlSuhaimi
keywords: Green analytical chemistry; Heavy metals; Multi-optical sensor; Multi-reverse flow injection analysis; Natural waters