Zobrazeno 1 - 10
of 191
pro vyhledávání: '"L.S. Bark"'
Publikováno v:
Analytica Chimica Acta. 268:171-176
A rapid method is proposed for the determination of thiol sulphur in petroleum oil fractions. The thiol is reacted with phenylmercury(II) acetate in a kerosene medium. By adjusting the sensitivity of the system the heat changes are usable over a wide
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1fa13f7ab19481d245470bb08e12cacf
https://doi.org/10.1016/0003-2670(92)85261-4
https://doi.org/10.1016/0003-2670(92)85261-4
Autor:
L.S. Bark, Yateman Arryanto
Publikováno v:
Analytica Chimica Acta. 263:119-129
Two procedures are proposed for the determination of the residual plyacrylamides in potable waters which have been previously claraified by treatment with polyacrylamides. The procedures are based on the precipitation of trace amounts of the polyacry
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e2b429d873c7575e896331d8bcc79991
https://doi.org/10.1016/0003-2670(92)85433-7
https://doi.org/10.1016/0003-2670(92)85433-7
Autor:
L.S. Bark, Yateman Arryanto
Publikováno v:
The Analyst. 116:1149
The determination of trace amounts of non-ionic, cationic and anionic polyacrylamides in waters has been critically investigated. The polyacrylamides are reacted with hypochlorite from either sodium hypochlorite or Chloramine T to produce amines, whi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::453f81b410154dc5c02bd2cfd5b242a0
https://doi.org/10.1039/an9911601149
https://doi.org/10.1039/an9911601149
Autor:
P. Prachuabpaibul, L.S. Bark
Publikováno v:
Fresenius' Zeitschrift f�r Analytische Chemie. 280:373-376
Binary mixtures of hydrazine and one of the following N-containing bases: ammonia, aniline, hydroxylamine, thiocyanate and unsymmetrical dimethyl hydrazine have been assayed thermometrically. The titrations are based both on the basic and the reducin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f4e771efa884bd030e816e39dcf52727
https://doi.org/10.1007/bf00439074
https://doi.org/10.1007/bf00439074
Autor:
P. Prachuabpaibul, L.S. Bark
Publikováno v:
Analytica Chimica Acta. 87:505-509
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c396b83cbacb213aad325f346da2925b
https://doi.org/10.1016/s0003-2670(01)82283-2
https://doi.org/10.1016/s0003-2670(01)82283-2
Autor:
L.S. Bark, P. Prachuabpaibul
Publikováno v:
Fresenius' Zeitschrift f�r Analytische Chemie. 283:293-297
The heat of precipitation of some metal sulphides has been used to assay some metal salt solutions. The hydrogen sulphide has been used as the precipitant and in a enthalpimetric system as the titrant. The method has been used for the determination o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::148091b9a25400424790253f7c35c6dd
https://doi.org/10.1007/bf00437550
https://doi.org/10.1007/bf00437550
Autor:
L.S. Bark, P. Prachuabpaibul
Publikováno v:
Analytica Chimica Acta. 72:196-199
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e4e08a685e7e0576e905e0bd51311d68
https://doi.org/10.1016/s0003-2670(01)82965-2
https://doi.org/10.1016/s0003-2670(01)82965-2
Publikováno v:
Analytica Chimica Acta. 87:473-477
The individual components of mixtures of chloride (0–1 mmol), bromide and iodide (0–0.1 mmol) may be determined by the use of direct injection enthalpimetry. The heats of reaction of the ions with various reagents have been shown to be additive a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1ced155ce75b145a13cf22707c2d5947
https://doi.org/10.1016/s0003-2670(01)82276-5
https://doi.org/10.1016/s0003-2670(01)82276-5
Autor:
L.S. Bark, P. Prachuabpaibul
Publikováno v:
Analytica Chimica Acta. 84:207-210
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::858d6c1e117eebe112af84ebf80d4528
https://doi.org/10.1016/s0003-2670(01)82859-2
https://doi.org/10.1016/s0003-2670(01)82859-2
Publikováno v:
Journal of Inorganic and Nuclear Chemistry. 40:1661-1664
The rate of the reaction between sodium hydroxide and oxalatotetraamminecobalt(III) ion was measured for a variety of hydroxide ion concentrations and at four temperatures. The rate law below 333 K is given by k obs = k 0 + k 2 [OH − ] 2 and above
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9c6129dcf171a14c27426e99c15d5493
https://doi.org/10.1016/0022-1902(78)80345-5
https://doi.org/10.1016/0022-1902(78)80345-5