Zobrazeno 1 - 10
of 19
pro vyhledávání: '"Anil K. Chakrabarti"'
Publikováno v:
The Analyst. 115:439-443
A highly sensitive, fairly selective, direct spectrofluorimetric method for the determination of ultratrace levels of manganese is described. The method is based on the selective oxidation of the very weakly fluorescent 2-(α-pyridyl)thioquinaldinami
Autor:
Anil K. Chakrabarti
Publikováno v:
Talanta. 42(9)
A sensitive and selective photometric method for the trace determination of vanadium with cinnamohydroxamic acid extracted from 1.8 M HCl in methyl isobutyl ketone is described. The wine-red chelate formed under an optimum acidity of 1.3–2.6 M HCl
Publikováno v:
Mikrochimica Acta. 81:307-315
A new extractive photometric method has been developed for a binary complex of vanadium(V) with salicylhydroxamic acid, a bluish-violet complex at pH 3.0 and a violet ternary complex system with ammonium thiocyanate at pH 0.95, both complex species b
Publikováno v:
Mikrochimica Acta. 97:393-401
A direct fluorimetric method for determining Cr(VI) in aqueous solutions is described. The nonfluorescent reagent 2-(α-pyridyl)-thioquinaldinamide (PTQA) and Cr(VI) interact to produce an intensely fluorescent species [λex(max) 360 nm; λem(max) 50
Publikováno v:
Analytica Chimica Acta. 206:351-355
The very sensitive fluorimetric determination of selenium(IV) is based on its oxidation of the non-fluorescent 2-(α-pyridyl)thioquinaldinamide in slightly acidic solution (0.05–0.15 M sulphuric acid). The excitation and emission wavelengths are 35
Autor:
Saswati P. Bag, Anil K. Chakrabarti
Publikováno v:
Analytica Chimica Acta. 59:225-230
A new spectrophotometric method for determination of tungsten with disodium cis-1.2-dicyanoethylene dithiolate as reagent is described. Tungsten forms a red-violet complex in 50% water-acctonitrile solution and has an absorption maximum at 570 nm. Th
Publikováno v:
Talanta. 29:526-528
A mixed-ligand complex of vanadium(V) with N-benzohydroxamic acid and thiocyanate formed at various acidities can be extracted into methyl isobutyl ketone, and used for photometric determination of trace amounts of vanadium in materials such as alloy
Autor:
ANIL K. CHAKRABARTI
Department of Chemistry, Jadavpur University, Calcutta-700 032 Manuscript received 9 December 1981, revised 26 March 1985, accepted 31 July 1985 A new sulphur reagent for copper(II) has been synthesised for its detection and determination. A very sim
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ff4e22e0e43cebf77df2cff51a742da6
Autor:
SASWATI P. BAG, ANIL K. CHAKRABARTI
Department of Chemistry, Jadavpur University, Calcutta-700032 Manuscript received 12 March 1973; revised 12 November 1973; accepted 18 February 1974 The stability constants of a 1 : 2 metal-ligand complex system have been evaluated spectra-photometri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7fb7c28da80368041b4a39851588dee2
Autor:
Anil K. Chakrabarti, Saswati P. Bag
Publikováno v:
Talanta. 23(10)
A new extractive photometric method is described for estimation of molybdenum with 2-aminobenzenethiol. The green complex in chloroform has its absorbance maximum at 700 nm and is stable for 2 hr when extracted from a solution of optimum pH range 1.4