Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Ala'ddin M. Almuaibed"'
Autor:
Ala'ddin M. Almuaibed, Alan Townshend
Publikováno v:
Analytica Chimica Acta. 388:339-343
The flow injection chemiluminescence (CL) determination of ornithine and the sequential determination of lysine and ornithine by using immobilized lysine oxidase are described. Hydrogen peroxide produced in the enzyme-catalysed reaction is determined
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fb21000a7c1c30a32c2a21780f6f95f1
https://doi.org/10.1016/s0003-2670(98)00455-3
https://doi.org/10.1016/s0003-2670(98)00455-3
Autor:
Alan Townshend, Ala'ddin M. Almuaibed
Publikováno v:
Analytica Chimica Acta. 338:149-154
Flow injection amperometric and chemiluminescence methods for the individual and simultaneous determination of lysine and glucose by using lysine oxidase and glucose oxidase are described in this paper. The calibration graphs for lysine are linear ov
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9e203bd6817a75eaad4dbefcddc8a071
https://doi.org/10.1016/s0003-2670(96)00439-4
https://doi.org/10.1016/s0003-2670(96)00439-4
Autor:
Alan Townshend, Ala'ddin M. Almuaibed
Publikováno v:
Analytica Chimica Acta. 295:159-163
A flow spectrophotometric method for the preconcentration and determination of hydrogen peroxide is developed. It is based on the formation of the titanium(IV) peroxo complex and its retention on a minicolumn cation exchanger, elution with sulphuric
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4a59c2a074b39a408b8cc569a17c83e6
https://doi.org/10.1016/0003-2670(94)80346-3
https://doi.org/10.1016/0003-2670(94)80346-3
Autor:
Ala'ddin M. Almuaibed, Alan Townshend
Publikováno v:
Analytica Chimica Acta. 245:115-119
Flow-injection spectrophotometric procedures are described for the determination of chloride and bromide using on-line solid mercury(II) thiocyanate and silver thiocyanate minicolumns, respectively. The linear response ranges for chloride and bromide
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c0b060e72bb673e9afad5bac9f5efc45
https://doi.org/10.1016/s0003-2670(00)80209-3
https://doi.org/10.1016/s0003-2670(00)80209-3
Publikováno v:
Fresenius' Journal of Analytical Chemistry. 362:167-169
A new flow injection chemiluminescence method for the assay of medazepam is explored. The method involves the use of permanganate in sulfuric acid for the oxidation of medazepam with the emission of chemiluminescence detected by a photomultiplier tub
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5a4e7eb48c73d590da2a05837d17404f
https://doi.org/10.1007/s002160051051
https://doi.org/10.1007/s002160051051
Publikováno v:
Analytical Sciences. 7:623-625
A procedure is presented for determining titanium(IV) (10-6-10-2M) in a flow injection system using chemiluminescence detection resulting from the reaction of titanium(III) with a carbonate buffer after passage of the titanium(IV) samples through a J
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::df2422a22f9b5cf7f9ce703e655db249
https://doi.org/10.2116/analsci.7.623
https://doi.org/10.2116/analsci.7.623
Autor:
Alan Townshend, Ala'ddin M. Almuaibed
Publikováno v:
Talanta. 39(11)
Flow injection methods for the individual and simultaneous determination of ascorbic acid and uric acid are proposed. A spectrophotometer and a miniamperometric detector are connected in sequence. The calibration graphs for uric acid obtained by meas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c853512357546c243b4752ee0be5d153
https://pubmed.ncbi.nlm.nih.gov/18965554
https://pubmed.ncbi.nlm.nih.gov/18965554
Autor:
Ala'ddin M. Almuaibed, Alan Townshend
Publikováno v:
Fresenius' Journal of Analytical Chemistry. 352:601-602
On-line ion-exchange preconcentration of iron(III) on a conventional cation exchange resin with spectrophotometric detection based on thiocyanate complexation is described. The calibration graph is linear over the range 0.01–0.2 μg ml−1 and the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cad6469e1343afbad2252aa4d9b47eb4
https://doi.org/10.1007/bf00323083
https://doi.org/10.1007/bf00323083
Autor:
Ala'ddin M. Almuaibed, Alan Townshend
Publikováno v:
Fresenius' Zeitschrift für analytische Chemie. 335:905-909
Methods for the individual and sequential flow injection spectrophotometric determination of vanadium(V) and titanium(IV) are proposed, based on the formation of peroxo complexes. The detection limits are 1.0 × 10−5 mol/l V (120 μl) and 2.5 × 10
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0e92ba7a6f6787f5a6691941053b5144
https://doi.org/10.1007/bf00466379
https://doi.org/10.1007/bf00466379
Enzymatic methods for the determination of ethanol based on linear and cyclif flow-injection systems
Autor:
Ala'ddin M. Almuaibed, Alan Townshend
Publikováno v:
Analytica Chimica Acta. 214:161-172
Linear and cyclic systems are described for the determination of ethanol (ca. 0.17–30×10−3 M). In the linear system, the solution passes either through a minicolumn of yeast alcohol dehydrogenase (YADH) immobilized on controlled-pore glass or th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5e130a28bd96571a66c303fd3e0f3413
https://doi.org/10.1016/s0003-2670(00)80438-9
https://doi.org/10.1016/s0003-2670(00)80438-9