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Showing 25 to 36 of 763 entries
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Column preconcentration of gold by adsorbing AuCl4- onto methyltrioctyl ammonium chloride-naphthalene and subsequent atomic absorption spectrometric determination.

Analytical and bioanalytical chemistry

Behpour M, Attaran AM, Ghoreishi SM, Soltani N.
PMID: 15838616
Anal Bioanal Chem. 2005 May;382(2):444-7. doi: 10.1007/s00216-005-3076-9. Epub 2005 Apr 19.

A sensitive, selective and simple preconcentration method for ultra-trace gold determination has been developed that uses naphthalene-methyltrioctyl ammonium chloride (Aliquat 336s) as an adsorbent. Gold, in the form of AuCl4-, was retained by the adsorbent in the column at...

Aggregation numbers of cationic oligomeric surfactants: a time-resolved fluorescence quenching study.

Langmuir : the ACS journal of surfaces and colloids

Wattebled L, Laschewsky A, Moussa A, Habib-Jiwan JL.
PMID: 16519454
Langmuir. 2006 Mar 14;22(6):2551-7. doi: 10.1021/la052414h.

The micelle aggregation numbers (N(agg)) of several series of cationic oligomeric surfactants were determined by time-resolved fluorescence quenching (TRFQ) experiments, using advantageously 9,10-dimethylanthracene as fluorophore. The study comprises six dimeric ("gemini"), three trimeric, and two tetrameric surfactants, which are...

Monodisperse hollow titania nanospheres prepared using a cationic colloidal template.

Journal of colloid and interface science

Kim TH, Lee KH, Kwon YK.
PMID: 17027013
J Colloid Interface Sci. 2006 Dec 15;304(2):370-7. doi: 10.1016/j.jcis.2006.08.059. Epub 2006 Sep 07.

Titania-coated polymeric nanoparticles were synthesized based on the cationic colloidal particles which were prepared by surfactant-free emulsion copolymerization of styrene and butylacrylate in the presence of a cationic monomer, methacryloxyethyltrimethyl ammonium chloride (MOTAC) using azobis(isobutylamidine)hydrochloride (AIBA) as an initiator....

Determination of scandium in wolframite and in the residues obtained after the extraction of tungsten.

Talanta

Gokhale YW, Bhat TR.
PMID: 18960113
Talanta. 1967 Mar;14(3):435-7. doi: 10.1016/0039-9140(67)80020-1.

The separation of scandium from iron and manganese by extraction with TBP from hydrochloric acid was studied in detail and this method was applied to the estimation of scandium in wolframite and its residues. The method consists of the...

Changes in the Phosphorus Partition in Human Blood during Ammonium Chloride Acidosis.

The Biochemical journal

Kay HD.
PMID: 16743344
Biochem J. 1924;18(5):1133-8. doi: 10.1042/bj0181133.

No abstract available.

On-line monitoring of continuous beer fermentation process using automatic membrane inlet mass spectrometric system.

Talanta

Tarkiainen V, Kotiaho T, Mattila I, Virkajärvi I, Aristidou A, Ketola RA.
PMID: 18969939
Talanta. 2005 Mar 15;65(5):1254-63. doi: 10.1016/j.talanta.2004.08.051.

A fully automatic membrane inlet mass spectrometric (MIMS) on-line instrumentation for the analysis of aroma compounds in continuous beer fermentation processes was constructed and tested. The instrumentation includes automatic filtration of the sample stream, flushing of all tubing between...

Use of self-plasticizing EVA membrane for potentiometric anion detection.

Talanta

Torres KY, Garcia CA, Fernandes JC, de Oliveira Neto G, Kubota LT.
PMID: 18968170
Talanta. 2001 Jan 05;53(4):807-14. doi: 10.1016/s0039-9140(00)00571-3.

In this work, five different types of membranes were developed responsible to anion-selective electrodes. The membranes were based on tri-caprylyl-trimethyl-ammonium chloride (Aliquat-336S) supported on poly(ethylene-co-vinyl-acetate) copolymer (EVA). The sensors were prepared by solubilizing the copolymer with the appropriate exchanger...

A flow injection-ETAAS system for the on-line determination of total and dissolved silica in waters.

Talanta

Burguera M, Burguera JL, Carrero P, Rondón C.
PMID: 18968853
Talanta. 2002 Dec 06;58(6):1157-66. doi: 10.1016/s0039-9140(02)00205-9.

In this work total (Si-tot) and 'soluble' or reactive (Si-sol) concentrations of silicon in natural and tap waters were sequentially determined by electrothermal atomic absorption spectrometry (ETAAS). First, samples were on-line diluted based on the merging-zone principle in order...

An on-line flow-injection microwave-assisted mineralization and a precipitation/dissolution system for the determination of molybdenum in blood serum and whole blood by electrothermal atomic absorption spectrometry.

Talanta

Burguera JL, Burguera M, Rondón C.
PMID: 18968854
Talanta. 2002 Dec 06;58(6):1167-75. doi: 10.1016/s0039-9140(02)00199-6.

An on-line flow injection (FI) precipitation-dissolution system with microwave-assisted sample digestion has been developed for the electrothermal atomic absorption spectrometry (ETAAS) determination of trace or ultratrace amounts of molybdenum in human blood serum and whole blood samples. After the...

Flow-through bulk optode for the fluorimetric determination of perchlorate.

Talanta

Ortuño JA, Albero MI, García MS, Sánchez-Pedreño C, García MI, Expósito R.
PMID: 18969078
Talanta. 2003 Jun 13;60(2):563-9. doi: 10.1016/S0039-9140(03)00189-9.

A flow-through fluorescence bulk optode for the flow-injection determination of perchlorate is described. As the active constituents the optode incorporates the lipophilized pH indicator fluorescein octadecyl ester and methyl tridodecyl ammonium chloride, dissolved in a plasticized poly (vinyl) chloride...

The arterial blood in ammonium chloride acidosis.

The Journal of physiology

Haldane JB, Linder GC, Hilton R, Fraser FR.
PMID: 16993962
J Physiol. 1928 Aug 14;65(4):412-21. doi: 10.1113/jphysiol.1928.sp002486.

No abstract available.

A novel Urushi matrix chloride ion-selective field effect transistor.

Talanta

Wakida S, Yamane M, Hiiro K.
PMID: 18964523
Talanta. 1988 Apr;35(4):326-8. doi: 10.1016/0039-9140(88)80097-3.

A durable chloride ion-selective field effect transistor (ISFET) is proposed with Urushi as the membrane matrix. The chloride ion-sensing material is a quaternary ammonium chloride: trioctylmethylammonium chloride (TOMA-Cl) or tridodecylmethylammonium chloride (TDMA-Cl). The optimum composition of the Urushi membrane...

Showing 25 to 36 of 763 entries