Simultaneous determination of fluoride and monofluorophosphate in toothpastes by supressed ion chromatography

Simultaneous Determination of Chelating Agents by Ion-Suppression and Ion-Pair Chromatography in Wastewater

Total and soluble fluoride concentration of toothpastes available in Iran

Objective: Using fluoridated toothpaste is one of the effective preventive methods of dental caries. The aim of this study was to evaluate the total and soluble fluoride concentration in different toothpastes available in the Iranian market.   Methods & Materials: In this study, total and soluble fluoride concentration of eight brands of Iranian and five brands of non-Iranian toothpastes wer...

Simultaneous determination of caffeine, theobromine and theophylline in foods and pharmaceutical preparations by using ion chromatography

Two ion chromatographic methods have been proposed for the simultaneous determination of caffeine, theobromine and theophylline. The separations were based on isocratic elutions and the determinations on ultraviolet absorbance detections at 274 nm. The detection limits (signal-to-noise ratio 3:1) for the three compounds were all below sub-mg mlÿ1 level. The methods have been successfully applie...

Simultaneous Determination of Four Preservatives in Foodstuffs by High Performance Liquid Chromatography

Background and objectives:  High concentration of preservatives in food may result in gastrointestinal disturbances whereby some patients suffering from asthma, rhinitis, or urticaria. The aim of this study is the introduction and optimization a new method for simultaneous determination of four preservatives (SB, PS, MP, PP) in foodstuff by high performance liquid chromatography. Materi...

Simultaneous determination of triprolidine and pseudoephedrine in human plasma by liquid chromatography-ion trap mass spectrometry.

A highly efficient, selective and specific method for simultaneous quantitation of triprolidine and pseudoephedrine in human plasma by liquid chromatography-ion trap-tandem mass spectrometry coupled with electro spray ionization (LC-ESI-ion trap-tandem MS) has been validated and successfully applied to a clinical pharmacokinetic study. Both targeted compounds together with the internal standard...