TY - JOUR
T1 - Spectrophotometric sensor system based on a liquid waveguide capillary cell for the determination of titanium
T2 - application to natural waters, sunscreens and a lake sediment
AU - Páscoa, Ricardo N. M. J.
AU - Tóth, Ildikó V.
AU - Almeida, Agostinho A.
AU - Rangel, António O. S. S.
PY - 2011/9/20
Y1 - 2011/9/20
N2 - An analytical procedure for the spectrophotometric determination of titanium at trace levels was developed. The procedure involves the use of a multi-pumping flow system (MPFS) coupled with a liquid waveguide capillary cell (LWCC) with 1.0 m path length, 550 μm i.d. and 250 μL internal volume, which enabled to enhance the sensitivity of the determination and thus avoid complex and time-consuming pre-concentration steps. The determination is based on the colorimetric reaction of titanium with chromotropic acid. The limit of detection (3σ) was 0.4 μg/L and a linear response up to 100 μg/L with a sample throughput of 46 h-1, and a low reagent consumption/effluent production was achieved. The developed procedure was applied to natural waters, sunscreen formulations and one certified lake sediment sample.
AB - An analytical procedure for the spectrophotometric determination of titanium at trace levels was developed. The procedure involves the use of a multi-pumping flow system (MPFS) coupled with a liquid waveguide capillary cell (LWCC) with 1.0 m path length, 550 μm i.d. and 250 μL internal volume, which enabled to enhance the sensitivity of the determination and thus avoid complex and time-consuming pre-concentration steps. The determination is based on the colorimetric reaction of titanium with chromotropic acid. The limit of detection (3σ) was 0.4 μg/L and a linear response up to 100 μg/L with a sample throughput of 46 h-1, and a low reagent consumption/effluent production was achieved. The developed procedure was applied to natural waters, sunscreen formulations and one certified lake sediment sample.
KW - Liquid waveguide capillary cell
KW - Multi-pumping flow system
KW - Spectrophotometry
KW - Titanium
KW - Trace analysis
UR - http://www.scopus.com/inward/record.url?scp=79959656487&partnerID=8YFLogxK
U2 - 10.1016/j.snb.2011.03.025
DO - 10.1016/j.snb.2011.03.025
M3 - Article
AN - SCOPUS:79959656487
SN - 0925-4005
VL - 157
SP - 51
EP - 56
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
IS - 1
ER -