| Title: | Determination of Trace Cr(VI) with Diphenylcarbazide by μFIA–Thermal Lens Microscopy |
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| Authors: | ID Gor’kova, Tatyana, Lomonosov Moscow State University (Author)
ID Proskurnina, Michail, Lomonosov Moscow State University (Author)
ID Liu, Mingqiang, UNG (Author)
ID Franko, Mladen, UNG (Author) |
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| Files: |
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| Language: | English |
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| Work type: | Not categorized |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | UNG - University of Nova Gorica
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| Abstract: | The optimum reaction parameters for the interaction of hexavalent chromium [Cr(VI)] with diphenylcarbazide in microfluidic
chips (μFIA) with thermal-lens microscopic detection were selected. The characteristic feature of the applied
flow scheme is the injection of the reagent into the stream containing the test metal, which enables in-field and
real-time monitoring of Cr(VI) simply by flowing the sample continuously through the microchip. The limit of detection
of Cr(VI) under the selected conditions (signal generating wavelength, 514.5 nm; excitation power, 100 mW; detection
position, 10 cm downstream from the mixing zone of the microchip; flow rate 10 μL min–1; injection volume,
1.4 μL) is 15 ng mL–1 (2.9 × 10–7 mol L–1). The linear range is 40 ng mL–1 – 10 μg mL–1 with a relative standard deviation
no higher than 10% in the concentration range 0.1–1 μg mL–1. The online monitoring by this scheme provides the
possibility of up to 360 analyses per hour. |
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| Keywords: | Photothermal lensing, thermal-lens microscopic detection, microfluidic applications, μFIA, hexavalent
chromium, diphenylcarbazide |
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| Publication version: | Version of Record |
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| Year of publishing: | 2016 |
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| Number of pages: | 772-780 |
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| Numbering: | 63 |
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| PID: | 20.500.12556/RUNG-2851-56e36fe3-a32f-a809-1bbf-f16bc0bd7475 |
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| COBISS.SI-ID: | 4602875 |
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| DOI: | 10.17344/acsi.2016.2549 |
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| NUK URN: | URN:SI:UNG:REP:QQNFZC6I |
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| Publication date in RUNG: | 12.12.2016 |
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| Views: | 4471 |
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| Downloads: | 0 |
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