-
Article
Advanced Stopped-in-Loop Flow Analysis with a Reagents-Merging Zones Technique for a Catalytic Successive Determination of Vanadium and Iron
An advanced stopped-in-loop flow analysis (SILFA) is proposed for the catalytic determinations of vanadium and iron. The chemistry relies on a vanadium- or iron-catalyzed oxidative reaction of p-anisidine by brom...
-
Article
Automatic On-line Solid-phase Extraction-Electrothermal Atomic Absorption Spectrometry Exploiting Sequential Injection Analysis for Trace Vanadium, Cadmium and Lead Determination in Human Urine Samples
A fully automated sequential injection column preconcentration method for the on-line determination of trace vanadium, cadmium and lead in urine samples was successfully developed, utilizing electrothermal ato...
-
Article
A Multiple Processing Hybrid Flow System for Analysis of Formaldehyde Contamination in Food
This work proposes a flow system suitable for the rapid screening of formaldehyde contaminated in food. The system is based on the concept of a flow analyzer with a Hantzsch reaction. An operating procedure wa...
-
Article
Highly Sensitive Determination of Cadmium and Lead in Leached Solutions from Ceramic Ware by Graphite Furnace Atomic Absorption Spectrometry Coupled with Sequential Injection-based Solid Phase Extraction Method
A fully automated pretreatment system based on sequential injection solid-phase extraction (SPE) coupled to a graphite furnace atomic absorption spectrometer (Auto-Pret-GFAAS system) was developed to determine...
-
Article
Simultaneous Injection-Effective Mixing Analysis of Palladium
A novel concept of simultaneous injection-effective mixing analysis (SIEMA) is proposed, and a SIEMA method applied to the spectrophotometric determination of palladium using a water-soluble chromogenic reagen...
-
Article
Advancement of Flow-based Analysis with Alternative Chemical Reactions and New Devices for Environmental and Biological Samples
This review includes our researches and other methodologies related to flow-based techniques, such as flow injection analysis (FIA) and sequential injection analysis (SIA). The methods will demonstrate semi- a...
-
Article
Flow Injection Analysis for Oxidation State Speciation of Vanadium(IV) and Vanadium(V) in Natural Water
A sensitive and simultaneous spectrophotometric flow injection method for the determination of vanadium(IV) and vanadium(V) is proposed. The method is based on the effect of ligands such as 2,4,6-tris(2-pyridy...
-
Article
An Alternative Interface for a Flow Injection-Capillary Electrophoresis System with Electrokinetic Injection
An alternative interface for flow injection-capillary electrophoresis based on electrokinetic injection is described. The interface basically consists of tubular platinum and a commercially available standard ...
-
Article
Stopped-in-Loop Flow Analysis of Trace Vanadium in Water
The new concept of stopped-in-loop flow analysis (SIL-FA) is proposed, and an SIL-FA method for the catalytic determination of vanadium is demonstrated. In an SIL format, a sample solution merges with reagent(...
-
Article
Simultaneous Spectrophotometric Analysis of Aliphatic Amines Utilizing Thermochromism of Charge-Transfer Complexes with Tetrabromophenolphthalein Ethyl Ester
Aliphatic amines, such as n-hexylamine (primary), di-n-hexylamine (secondary) and tri-n-hexylamine (tertiary amine), react with tetrabromophenolphthalein ethyl ester molecules (TBPEH) to form reddish or red-viole...
-
Article
Successive Determination of Copper and Iron by a Flow Injection-Catalytic Photometric Method Using a Serial Flow Cell
A flow injection-catalytic spectrophotometric method using a serial flow cell was proposed for the successive determination of trace amounts of copper and iron. This method is based on the oxidation coupling of p
-
Article
Simultaneous Determination of Cationic Surfactants and Nonionic Surfactants by Ion-Association Titration
A simultaneous determination of cationic and nonionic surfactants has been developed using ion-association titration. Tetrabromophenolphthalein ethyl ester (TBPE) was used as an indicator. Benzalkonium reacted...
-
Article
Catalytic Flow-Injection Determination of Sub-ppb Copper(II) Using the Redox Reaction of Cysteine with Iron(III) in the Presence of 2,4,6-Tris(2-pyridyl)-1,3,5-triazine
A kinetic-catalytic spectrophotometric flow-injection method was developed for the rapid and sensitive determination of trace amounts of copper(II). The method is based on the catalytic effect of copper(II) on...
-
Article
Stepwise Determination of Quaternary Ammonium Salts and Aromatic Amines in Pharmaceuticals by Ion Association Titration
A stepwise titrimetric method has been developed for the simultaneous determination of pharmaceutical quaternary ammonium salts (R4N+) and aromatic amines (R3N). The method is based on the solvent extraction of R
-
Article
Ion Association Titration for the Determination of Local Anesthetics in Pharmaceuticals with Tetrabromophenolphthalein Ethyl Ester as an Indicator
-
Article
Analytical Sciences Editorial Board Members
-
Article
New Design of a Multi-Channel Micro Cell for Simultaneous Analysis in the Flow-Injection Method
-
Article
Enhancement of Selectivity and Sensitivity for Berberine Determination by Extraction-Fluorophotometry
-
Article
Formation of ternary ion associates using diprotic acid dyes and its application to determination of cationic surfactants
A sensitive and selective method is described for the determination of cationic surfactants, such as benzethonium, benzalkonium, cetylpyridinium and trimethylstearylammonium, based on the formation and extract...
-
Article
Spectrophotometry Determination of Gallium with 2-[2-(3,5-Dibromopyridyl)-azo]-5-diethylaminobenzoic Acid
