A compact multi-parameter detection system based on hydrodynamic sequential injection for sensitive determination of phosphate, nitrite, and nitrate in water samples
| Autor: | Somkid Pencharee, Wanpen Khongpet, Jaroon Jakmunee, Somchai Lapanantnoppakhun, Autchara Paukpol, Yutdanai Yodthongdee, Pattama Yanu, Supaporn Kradtap Hartwell, Chanida Puangpila |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Chromatography
Calibration curve General Chemical Engineering 010401 analytical chemistry General Engineering chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology Phosphate 01 natural sciences Nitrogen 0104 chemical sciences Analytical Chemistry Working range chemistry.chemical_compound chemistry Molybdenum blue Nitrate Reagent Nitrite 0210 nano-technology |
| Zdroj: | Analytical Methods. 12:855-864 |
| ISSN: | 1759-9679 1759-9660 |
| Popis: | A miniaturized microfluidic hydrodynamic sequential injection system for multi-parameter analysis with a sensitive colorimetric detection was developed to improve the analytical performance for the measurement of phosphate, nitrite, and nitrate based on molybdenum blue and Griess methods. A homemade colorimetric detection with a light emitting diode as a light source and phototransistor light sensor was integrated into the microfluidic platform to achieve a low cost compact system with low reagent consumption and high sensitivity. Under the optimized working conditions, a linear calibration graph of phosphate (two working range), nitrite and nitrate (as nitrogen, N) in the range of 0.01–0.1 and 0.3–1.0 mg of PO43− P L−1, 0.005–0.05 mg of NO2− N L−1 and 0.01–0.12 mg of NO3− N L−1, respectively were achieved with a sample-throughput of 10 h−1. The limit of detections were 0.005 mg of PO43− P L−1, 0.0026 mg of NO2− N L−1 and 0.005 mg of NO3− N L−1. The percentage of recovery for phosphate, nitrite, and nitrate were 90.3–115.0, 90.0–117.0 and 91.3–117.0, respectively, with relative standard deviations in the range of 1.07–4.90%. Capabilities of the developed device for consecutive analysis of multiple analytes were demonstrated to be an excellent choice for water quality monitoring. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|