Sequential determination of carbon dioxide and free sulfur dioxide in wine by flow-injection pervaporation with in series potentiometric-photometric detection

1999 ◽  
Vol 365 (4) ◽  
pp. 377-380 ◽  
Author(s):  
E. Mataix ◽  
M. D. Luque de Castro
Keyword(s):  
Carbon Dioxide ◽  
Sulfur Dioxide ◽  
Flow Injection ◽  
Sequential Determination ◽  
Photometric Detection ◽  
In Series ◽  
Free Sulfur

Determination of total and free sulfur dioxide in wine by pervaporation–flow injection

The Analyst ◽  
1998 ◽  
Vol 123 (7) ◽  
pp. 1547-1549 ◽  
Author(s):  
E. Mataix ◽  
M. D. Luque de Castro
Keyword(s):  
Sulfur Dioxide ◽  
Flow Injection ◽  
Free Sulfur

scholarly journals Sequential determination of chromium(VI) and chromium(III) by potentiometric flow-injection method.

2000 ◽  
Vol 49 (1) ◽  
pp. 59-64 ◽  
Author(s):  
Hiroki OHURA ◽  
Toshihiko IMATO ◽  
Ikuo MATSUO ◽  
Sumio YAMASAKI
Keyword(s):  
Flow Injection ◽  
Injection Method ◽  
Sequential Determination ◽  
Chromium Vi

scholarly journals Flow injection analysis of water. Part 1: Automatic preconcentration determination of sulphate, ammonia and iron(II)/iron(III)

1993 ◽  
Vol 15 (4) ◽  
pp. 141-146 ◽  
Author(s):  
J. S. Cosano ◽  
M. D. Luque de Castro ◽  
M. Valcárcel
Keyword(s):  
Flow Injection ◽  
Good Reproducibility ◽  
Chemical Systems ◽  
Sequential Determination ◽  
On Line ◽  
Exchange Material ◽  
Iron Complexation ◽  
Simple Flow ◽  
Ammonia Formation

This paper describes a simple flow-injection (FI) manifold for the determination of a variety of species in industrial water. The chemical systems involved in the determination of ammonia (formation of Indophenol Blue), sulfate (precipitation with Ba(II)), and iron (complexation with 1,10-phenanthroline with the help of a prior redox reaction for speciation) were selected so that a common manifold could be used for the sequential determination of batches of each analyte. A microcolumn of a suitable ion exchange material was used for on-line preconcentration of each analyte prior to injection; linear ranges for the determination of the analytes at the ng/ml levels were obtained with good reproducibility. The manifold and methods are ready for full automation.

scholarly journals Automation of flow injection gas diffusion-ion chromatography for the nanomolar determination of methylamines and ammonia in seawater and atmospheric samples

1995 ◽  
Vol 17 (6) ◽  
pp. 205-212 ◽  
Author(s):  
Stuart W. Gibb ◽  
John W. Wood ◽  
R. Fauzi ◽  
C. Mantoura
Keyword(s):  
Ion Chromatography ◽  
Flow Injection ◽  
Aqueous Media ◽  
Control Unit ◽  
Gas Diffusion ◽  
Aqueous Sample ◽  
In Series ◽  
And Performance ◽  
Improved Design

The automation and improved design and performance of Flow Injection Gas Diffusion-Ion Chromatography (FIGD-IC), a novel technique for the simultaneous analysis of trace ammonia (NH3) and methylamines (MAs) in aqueous media, is presented. Automated Flow Injection Gas Diffusion (FIGD) promotes the selective transmembrane diffusion of MAs and NH3from aqueous sample under strongly alkaline (pH > 12, NaOH), chelated (EDTA) conditions into a recycled acidic acceptor stream. The acceptor is then injected onto an ion chromatograph where NH3and the MAs are fully resolved as their cations and detected conductimetrically. A versatile PC interfaced control unit and data capture unit (DCU) are employed in series to direct the selonoid valve switching sequence, IC operation and collection of data. Automation, together with other modifications improved both linearily (R2> 0.99 MAs 0-100 nM, NH30-1000 nM) and precision (<8%) of FIGD-IC at nanomolar concentrations, compared with the manual procedure. The system was successfully applied to the determination of MAs and NH3in seawater and in trapped particulate and gaseous atmospheric samples during an oceanographic research cruise.

Flow injection determination of gaseous sulfur dioxide with gas permeation denuder-based online sampling and preconcentration

2002 ◽  
Vol 374 (6) ◽  
pp. 1141-1146 ◽  
Author(s):  
Zhong-Xian Guo ◽  
Yuan-Zong Li ◽  
Xin-Xiang Zhang ◽  
Wen-Bao Chang ◽  
Yun-Xiang Ci
Keyword(s):  
Sulfur Dioxide ◽  
Flow Injection ◽  
Gas Permeation ◽  
Gaseous Sulfur ◽  
Online Sampling

Gas-Solid Chromatographic Determination of Oxygen, Nitrogen, Carbon Dioxide, Ethylene, and Nitrous Oxide at Ambient Temperature

1973 ◽  
Vol 56 (1) ◽  
pp. 119-123
Author(s):  
Martin J Finkelson
Keyword(s):  
Carbon Dioxide ◽  
Nitrous Oxide ◽  
Ambient Temperature ◽  
Molecular Sieve ◽  
Internal Standard ◽  
Chromatographic Determination ◽  
Digital Integrator ◽  
In Series ◽  
Peak Areas

Abstract A gas-solid chromatographic method is described for the separation and determination of 5 medicinal gases at ambient temperature, using 2 gas chromatographic columns, Porapak Q and Molecular Sieve 13X, operated in series with a 6-port thermal conductivity detector and I recorder. An electronic digital integrator is used for calculating peak areas. Data on retention time, linearity, reproducibility of injection, and comparison with absorption methods are presented. Analytical results for oxygen, nitrogen, carbon dioxide, ethylene, and nitrous oxide are attainable within 1.0% without the use of an internal standard.

Sign in / Sign up

Export Citation Format

Share Document