Naslov
Determination of low arsenic concentrations in light gasoline by GFAAS technique

Autori
Djetelić Ibrahimpašić, Mateja ; Štrkalj, Anita ; Vuković, Ana ; Boras, Ivan ; Škrobica, Ana

Izvornik
Goriva i maziva (0350-350X) 52 (2013), 1; 29-40

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
isomerization ; platinum based catalyst ; arsenic ; gasoline ; GFAAS ; validation

Sažetak
The main parts of the light naphtha isomerization unit in oil refinery are reactors loaded with platinum base catalyst. Even small amount of water, sulfur, oxygenates and/or nitrogen is poisonous for the catalyst. In addition, the catalyst activity is negatively affected by metals. Arsenic, one of the metal poisons, decreases the catalyst activity in μg/l quantity. Therefore, it’s crucial to detect it precisely in order to protect the expensive platinum based catalyst in time. A procedure for determination of arsenic in light gasoline at μg/l levels by graphite furnace atomic absorption spectrometry (GFAAS) is proposed. GFAAS is good alternative for the determination of trace metals in petroleum fractions and distillates to relatively expensive ICP-MS. Sample stabilization was achieved by mixing appropriate volumes of the sample, propan-1-ol and nitric acid aqueous solution. This mixture resulted in one-phase medium (microemulsion), which was indefinitely stable. Pd(NO3)2 solution was used as modifier. Validation of the method includes microemulsion stability, linearity, yield, precision, limit of detection and limit of quantification.

Izvorni jezik
Hrvatski

Znanstvena područja
Kemija, Kemijsko inženjerstvo

Napomena
Rad je objavljen i na hrvatskom jeziku pod naslovom
Određivanje niskih koncentracija arsena u lakom benzinu GFAAS tehnikom, str 29-34.
Stranice za engleski rad su 35-40

POVEZANOST RADA