Search Results - "Stefan, Raluca I"

Flow-injection analysis systems with different detection devices and other related techniques for the in vitro and in vivo determination of dopamine as neurotransmitter. A review by van Staden, Jacobus F, van Staden, Raluca I Stefan

“…Dopamine (DA) is one of the most important catecholamine neurotransmitters in the human central nervous system in the brain and plays a key role in the…”
Get full text

Determination of chromium(III) and chromium(VI) by use of a spectrophotometric sequential injection system by Mulaudzi, Ludwig V, van Staden, Jacobus F, Stefan, Raluca I

“…The importance of sequential injection analysis in speciation analysis is exemplified by the simultaneous determination of Cr(III) and Cr(VI) with an R.S.D. (…”
Get full text

Sequential injection spectrophotometric determination of iron as Fe(II) in multi-vitamin preparations using 1,10-phenanthroline as complexing agent by Tesfaldet, Zeriet O., van Staden, Jacobus F., Stefan, Raluca I.

“…A sequential injection analysis (SIA) system is proposed for the determination of iron (II). Fe(II) was determined by SIA based on the reaction between…”
Get full text

Selectivity in analytical chemistry (IUPAC Recommendations 2001) by Vessman, Jörgen, Stefan, Raluca I., van Staden, Jacobus F., Danzer, Klaus, Lindner, Wolfgang, Burns, Duncan Thorburn, Fajgelj, Aleš, Müller, Helmut

“…The correct use of the term "selectivity" and its clear distinction from the term "specificity" are discussed. A definition of selectivity is given, and it is…”
Get full text

On-line determination of iron(II) and iron(III) using a spectrophotometric sequential injection system by Mulaudzi, Ludwig V., van Staden, Jacobus F., Stefan, Raluca I.

“…The application of sequential injection analysis (SIA) for metal speciation analysis is presented. The proposed method was used for the quantitative…”
Get full text

Determination of the total acidity in soft drinks using potentiometric sequential injection titration by van Staden, J.(Koos) F, Mashamba, M.(Mulalo) G, Stefan, R.(Raluca) I

“…A potentiometric SI titration system for the determination of total acidity in soft drinks is proposed. The concept is based on the aspiration of the acid soft…”
Get full text

Determination of fenoterol hydrobromide by sequential injection analysis with spectrophotometric detection by Beyene, Negussie W, van Staden, Jacobus F, Stefan, Raluca I

“…A rapid, economical and automated sequential injection spectrophotometric determination of the phenolic sympathomimetic drug, fenoterol hydrobromide, is…”
Get full text

Sequential injection spectrophotometric determination of trace amounts of iodide by its catalytic effect on the 4,4′-methylenebis( N,N-dimethylaniline)-chloramine-T reaction by Tesfaldet, Zeriet O., van Staden, Jacobus F., Stefan, Raluca I.

“…A simple and sensitive sequential injection spectrophotometric procedure is proposed for the determination of trace amounts of iodide in pharmaceutical…”
Get full text

Spectrophotometric determination of magnesium in pharmaceutical preparations by cost-effective sequential injection analysis by Tesfaldet, Zeriet O., van Staden, Jacobus F., Stefan, Raluca I.

“…A simple and rapid, inexpensive spectrophotometric method was proposed for magnesium assay in pharmaceutical preparations by sequential injection analysis…”
Get full text

New horizons in sequential injection kinetic analysis by van Staden, J F, Stefan, Raluca I

“…The need to measure several quantities rapidly in the same sample has prompted the development of automated methods of analysis that in both the continuous and…”
Get full text

Application of porphyrins in flow-injection analysis: A review by van Staden, Jacobus F., Stefan-van Staden, Raluca I.

“…Porphyrins and metalloporphyrins fulfil a very important role in the metabolism of living organisms through biological pigments or biochromes and are therefore…”
Get full text

An on-line potentiometric sequential injection titration process analyser for the determination of acetic acid by van Staden, J F, Mashamba, Mulalo G, Stefan, Raluca I

“…An on-line potentiometric sequential injection titration process analyser for the determination of acetic acid is proposed. A solution of 0.1 mol L(-1) sodium…”
Get full text

Information essential for characterizing a flow-based analytical system (IUPAC Technical Report) by Zagatto, Elias A. G., van Staden, Jacobus F., Maniasso, Nelson, Stefan, Raluca I., Marshall, Graham D.

“…Essential aspects for characterization of a flow-based analytical procedure or system are discussed in order to permit the composition of a checklist that will…”
Get full text

On-line dilution and determination of the amount of concentrated hydrochloric acid in the final products from a hydrochloric acid production plant using a sequential injection titration system by van Staden, J.(Koos) F, Mashamba, Mulalo G, Stefan, Raluca I

“…An on-line sequential injection titration system for the determination of the concentration of concentrated hydrochloric acid as final product from a…”
Get full text

Sequential injection spectrophotometric determination of etilefrine hydrochloride by Beyene, Negussie W., van Staden, Jacobus F., Stefan, Raluca I.

“…A simple, fast, economical and automated sequential injection spectrophotometric method for the determination of etilefrine hydrochloride is developed. The…”
Get full text

Wireless Electrochemical Sensors: A Tool for Process Control Past, Present and the Future by van Staden, Jacobus F., Stefan-van Staden, Raluca I., Balasoiu, Simona C.

“…Wireless sensors are widely used in analytical chemistry. Their utilization in control will make the feed-back of the quality of processes in real time…”
Get full text

On-line determination of hydrochloric acid in process effluent streams by potentiometric sequential injection acid-base titration by Van Staden, J.F., Mashamba, M.G., Stefan, R.I.

“…An on-line potentiometric sequential injection acid-base system for the titration of a hydrochloric acid solution with a standard sodium hydroxide solution in…”
Get full text