TY - JOUR
T1 - Development of a turbidimetric sequential injection system to monitor the codfish desalting process
AU - Santos, Inês C.
AU - Mesquita, Raquel B. R.
AU - Galvis-Sánchez, Andrea C.
AU - Delgadillo, Ivonne
AU - Rangel, António Osmaro S. S.
N1 - Funding Information:
R. B. R. Mesquita, A. C. Galvis-Sánchez, and I. C. Santos thank the Fundação para a Ciência e Tecnologia (FCT, Portugal) and Fundo Social Europeu (FSE) the grants SFRH/BPD/41859/2007, SFRH/BPD/37890/2007 and CBQF/C2008/BII-2009/01-13, respectively.
PY - 2012/4
Y1 - 2012/4
N2 - Salt-cured codfish represents an ancient process of preservation but requires the rehydration of the codfish with the correspondent salt removal. This work describes the development of a sequential injection system for the on-line turbidimetric determination of chloride during a simulated desalting process. The samples are directly aspirated to the manifold with no need for previous off-line treatments; this was possible due to the use on an in-line dialysis process; a quantification range from 50. 0 mg/L to 20. 0 g/L was established using the same manifold configuration. For monitoring the entire process, involving several chloride determinations (ca. 10), less than 3 mL of the desalting water was needed. Furthermore, the overall reagent consumption was quite low: 0. 211 mg of AgNO3, 30. 6 mg of HNO3, and 31. 1 μg of PVA per determination. The accuracy of the system was evaluated by comparison with a potentiometric reference method. The determination rate was 28 and 31 h-1 according to the chloride concentration range. Several simulated desalting processes, under different conditions, were effectively monitored with the developed method.
AB - Salt-cured codfish represents an ancient process of preservation but requires the rehydration of the codfish with the correspondent salt removal. This work describes the development of a sequential injection system for the on-line turbidimetric determination of chloride during a simulated desalting process. The samples are directly aspirated to the manifold with no need for previous off-line treatments; this was possible due to the use on an in-line dialysis process; a quantification range from 50. 0 mg/L to 20. 0 g/L was established using the same manifold configuration. For monitoring the entire process, involving several chloride determinations (ca. 10), less than 3 mL of the desalting water was needed. Furthermore, the overall reagent consumption was quite low: 0. 211 mg of AgNO3, 30. 6 mg of HNO3, and 31. 1 μg of PVA per determination. The accuracy of the system was evaluated by comparison with a potentiometric reference method. The determination rate was 28 and 31 h-1 according to the chloride concentration range. Several simulated desalting processes, under different conditions, were effectively monitored with the developed method.
KW - Codfish desalting
KW - Dialysis
KW - Sequential injection analysis
KW - Turbidimetric chloride determination
UR - http://www.scopus.com/inward/record.url?scp=85028103632&partnerID=8YFLogxK
U2 - 10.1007/s12161-011-9238-9
DO - 10.1007/s12161-011-9238-9
M3 - Article
AN - SCOPUS:85028103632
SN - 1936-9751
VL - 5
SP - 287
EP - 295
JO - Food Analytical Methods
JF - Food Analytical Methods
IS - 2
ER -