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Determination of Iron Ion in the Water of a Natural Hot Spring Using Microfluidic Paper-based Analytical Devices
- Source :
- ResearcherID
- Publication Year :
- 2016
- Publisher :
- Springer Science and Business Media LLC, 2016.
-
Abstract
- Microfluidic paper-based analytical devices (μPADs) were used to detect the iron ion content in the water of a natural hot spring in order to assess the applicability of this process to the environmental analysis of natural water. The μPADs were fabricated using a wax printer after the addition of hydroxylamine into the detection reservoirs to reduce Fe(3+) to Fe(2+), 1,10-phenanthroline for the forming of a complex, and poly(acrylic acid) for ion-pair formation with an acetate buffer (pH 4.7). The calibration curve of Fe(3+) showed a linearity that ranged from 100 to 1000 ppm in the semi-log plot whereas the color intensity was proportional to the concentration of Fe(3+) and ranged from 40 to 350 ppm. The calibration curve represented the daily fluctuation in successive experiments during four days, which indicated that a calibration curve must be constructed for each day. When freshly prepared μPADs were compared with stored ones, no significant difference was found. The μPADs were applied to the determination of Fe(3+) in a sample of water from a natural hot spring. Both the accuracy and the precision of the μPAD method were evaluated by comparisons with the results obtained via conventional spectrophotometry. The results of the μPADs were in good agreement with, but less precise than, those obtained via conventional spectrophotometry. Consequently, the μPADs offer advantages that include rapid and miniaturized operation, although the precision was poorer than that of conventional spectrophotometry.
- Subjects :
- Paper
Environmental analysis
Calibration curve
Iron
Analytical chemistry
02 engineering and technology
Sensitivity and Specificity
01 natural sciences
Hot Springs
Analytical Chemistry
Ion
chemistry.chemical_compound
Lab-On-A-Chip Devices
Spectrophotometry
Calibration
medicine
Acrylic acid
Ions
Wax
medicine.diagnostic_test
Chemistry
010401 analytical chemistry
Linearity
Microfluidic Analytical Techniques
021001 nanoscience & nanotechnology
0104 chemical sciences
visual_art
visual_art.visual_art_medium
0210 nano-technology
Water Pollutants, Chemical
Subjects
Details
- ISSN :
- 13482246 and 09106340
- Volume :
- 32
- Database :
- OpenAIRE
- Journal :
- Analytical Sciences
- Accession number :
- edsair.doi.dedup.....1647c67c2e583c2f09437c714ed9fd3f