PMID- 19609655
OWN - NLM
STAT- MEDLINE
DCOM- 20100513
LR  - 20211020
IS  - 1573-4994 (Electronic)
IS  - 1053-0509 (Linking)
VI  - 20
IP  - 1
DP  - 2010 Jan
TI  - A gas diffusion technique coupled with flow injection systems. Optimization of 
      the process in its application to the fluorimetric determination of ammonium in 
      water samples.
PG  - 55-65
LID - 10.1007/s10895-009-0521-8 [doi]
AB  - A novel flow injection-gas-diffusion (GD-FI) system has been developed for the 
      on-line analysis of ammonium ion in waters with fluorimetric detection, using an 
      acceptor solution containing the Eosin-Bluish (EB) acid-base indicator. This, 
      together with optimization of the process of gas transfer through the membrane, 
      increases the sensitivity of the method to a considerable extent. Under optimum 
      conditions, it is possible to determine the analyte within the 0.02-1.5 mg l(-1) 
      range, with a limit of detection of 5 microg l(-1) and relative standard 
      deviations (n = 12, [NH (4) (+) ] = 50 microg l(-1) and 0.05 microg l(-1)) of 
      3.4% and 3.0% respectively. The determination rate was 15 samples per hour.
FAU - Almendral-Parra, Maria-Jesus
AU  - Almendral-Parra MJ
AD  - Departamento de Quimica Analitica, Nutricion y Bromatologia, University of 
      Salamanca, Plaza de la Merced s/n, Salamanca, 37008, Spain. almendral@usal.es
FAU - Alonso-Mateos, Angel
AU  - Alonso-Mateos A
FAU - Fuentes-Prieto, Maria-Socorro
AU  - Fuentes-Prieto MS
LA  - eng
PT  - Journal Article
DEP - 20090716
PL  - Netherlands
TA  - J Fluoresc
JT  - Journal of fluorescence
JID - 9201341
RN  - 0 (Gases)
RN  - 0 (Membranes, Artificial)
RN  - 0 (Quaternary Ammonium Compounds)
RN  - 059QF0KO0R (Water)
SB  - IM
MH  - Calibration
MH  - *Diffusion
MH  - Flow Injection Analysis/*methods
MH  - Fluorometry/*methods
MH  - Gases/*chemistry
MH  - Hydrogen-Ion Concentration
MH  - Kinetics
MH  - Membranes, Artificial
MH  - Quaternary Ammonium Compounds/*analysis
MH  - Reproducibility of Results
MH  - Spectrometry, Fluorescence
MH  - Temperature
MH  - Time Factors
MH  - Water/*chemistry
EDAT- 2009/07/18 09:00
MHDA- 2010/05/14 06:00
CRDT- 2009/07/18 09:00
PHST- 2009/03/03 00:00 [received]
PHST- 2009/07/08 00:00 [accepted]
PHST- 2009/07/18 09:00 [entrez]
PHST- 2009/07/18 09:00 [pubmed]
PHST- 2010/05/14 06:00 [medline]
AID - 10.1007/s10895-009-0521-8 [doi]
PST - ppublish
SO  - J Fluoresc. 2010 Jan;20(1):55-65. doi: 10.1007/s10895-009-0521-8. Epub 2009 Jul 
      16.