RT info:eu-repo/semantics/article
T1 Selective monitoring of oxyanion mixtures by a flow system with Raman detection
A1 Zapata Arráez, Félix
A1 Ortega Ojeda, Fernando Ernesto
A1 García Ruiz, Carmen
A1 González Herráez, Miguel
K1 Flow analysis
K1 Oxyanions
K1 Raman detection
K1 Ciencias tecnológicas
K1 Electrónica
K1 Technology
K1 Electronics
AB Raman spectroscopy is a selective detection system scarcely applied for the flow analysis of solutions with the aim of detecting several compounds at once without a previous separation step. This work explores the potential of a portable Raman system in a flow system for the selective detection of a mixture of seven oxyanions (carbonate, sulphate, nitrate, phosphate, chlorate, perchlorate, and thiosulphate). The specific bands of these compounds (symmetric stretching Raman active vibrations of carbonate at 1068 cm−1, nitrate at 1049 cm−1, thiosulphate at 998 cm−1, phosphate at 989 cm−1, sulphate at 982 cm−1, perchlorate at 935 cm−1, and chlorate at 932 cm−1) enabled their simultaneous detection in mixtures. Although the oxyanions’ limit of detection (LOD) was rather poor (in the millimolar range), this extremely simple system is very useful for the single-measurement detection of most of the oxyanions in mixtures, without requiring a previous separation step. In addition, quantitative determination of the desired oxyanion can be performed by means of the corresponding calibration line. These are important advantages for controlling in-line processes in industries like those manufacturing fertilizers, pharmaceuticals, chemicals, or food, among others.
PB MDPI
SN 1424-8220
YR 2018
FD 2018-07-08
LK http://hdl.handle.net/10017/34200
UL http://hdl.handle.net/10017/34200
LA eng
NO Ministerio de Educación y Ciencia
DS MINDS@UW
RD 20-abr-2024