Pregled bibliografske jedinice broj: 11644
Low-Molecular Weight Alcohols as Colour Stabilizers in the Spectrophotometric Determination of Extracted Molybdenum-Thiocyanate species
Low-Molecular Weight Alcohols as Colour Stabilizers in the Spectrophotometric Determination of Extracted Molybdenum-Thiocyanate species // Croatica chemica acta, 69 (1996), 1; 305-316 (međunarodna recenzija, članak, znanstveni)
CROSBI ID: 11644 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Low-Molecular Weight Alcohols as Colour
Stabilizers in the Spectrophotometric
Determination of Extracted Molybdenum-Thiocyanate
species
Autori
Allegretti Živčić, Vlasta ; Herak, Marko
Izvornik
Croatica chemica acta (0011-1643) 69
(1996), 1;
305-316
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
molybdenum(IV)-thiocyanate complex ; colour stabilizers
Sažetak
Molybdenum(VI) was reduced to its pentavalent state by ascorbic acid in the hydrochloric acid medium. The diminishing orange-red colour of the unstable molybdenum(V)-thiocyanate complex was stabilized by addition of low alcohols and by extraction either into chloroform or into butanol. Spectrophotometric measurements followed the extraction procedure. All the investigated systems obeyed Beer's law (lmax = 465 nm), molar absorptivities covering the range from 1.40x104 to 3.1x104 l mol-1 cm-1 depending on the system type. Based on the equilibrium shift method a reaction mechanism is proposed with MoO(NCS)3 as the extracted species solvated by each of the alcohols added.
Izvorni jezik
Engleski
Znanstvena područja
Kemija
Citiraj ovu publikaciju:
Časopis indeksira:
- Web of Science Core Collection (WoSCC)
- Science Citation Index Expanded (SCI-EXP)
- SCI-EXP, SSCI i/ili A&HCI
- Scopus
