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A low-cost automated flow analyzer based on low temperature co-fired ceramic and LED photometer for ascorbic acid determination

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Pessoa-Neto O., Santos V., Vicentini F., Suarez W., Alonso-Chamarro J., Fatibello-Filho O., Faria R.

Open Chemistry

2014

vol. 12

issue 3

341-347

An automated flow analyzer based on low temperature co-fired ceramic (LTCC), a solid-phase reactor (SPR) and a low-cost photometer was designed for ascorbic acid (AA) determination in pharmaceutical formulations. It consists of a peristaltic pump, three-way solenoid valves, SPR to chemically convert Cu(II) into Cu(I), and a LTCC device for mixing the liberated copper with bathocuproine and detection. The flow cell in the LTCC employed an ultrabright LED - photodiode photometer. The analyzer successfully determined AA in pharmaceutical formulations. The analytical curve from 8.5×10−6 to 7.0×10−4 M gave a detection limit of 7.0×10−7 M and a RSD of 2.1% for a 2.0×10−4 M AA solution (n = 10). A high sampling frequency of 102 h−1 and low reagent and sample consumption (150 µL) resulted.

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1 Open Chemistry

1 2014

1 Alonso-Chamarro J.

1 Faria R.

1 Fatibello-Filho O.

1 Pessoa-Neto O.

1 Santos V.

1 Suarez W.

1 Vicentini F.

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A low-cost automated flow analyzer based on low temperature co-fired ceramic and LED photometer for ascorbic acid determination