PMID- 12750869
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20031030
LR  - 20160512
IS  - 1618-2642 (Print)
IS  - 1618-2642 (Linking)
VI  - 376
IP  - 5
DP  - 2003 Jul
TI  - Determination of titanium by slurry sampling graphite furnace atomic absorption 
      spectrometry with the use of fluoride modifiers.
PG  - 721-7
AB  - A method for the determination of titanium in graphite furnace atomic absorption 
      spectrometry with slurry sampling was developed. Titanium forms thermally stable 
      carbides in the graphite tube that leads to decreased sensitivity and severe 
      memory effects. Various fluorinating agents, BaF(2), NH(4)F, and CHF(3) 
      (Freon-23) were therefore examined in order to reduce or eliminate these 
      problems. Ti was determined, at various concentration levels, in certified 
      reference materials (CRMs) using ultrasonic slurry sampling graphite furnace 
      atomic absorption spectrometry (USS-GFAAS). The three CRMs, GBW 07601 (Human Hair 
      Powder), GBW 07602 (Bush Branches and Leaves), and GBW 07411 (Chinese Soil), 
      contained 2.7 microg g(-1), 95 microg g(-1), and 0.41% Ti, respectively. For 
      comparison, determinations of Ti were made with modifiers (BaF(2) and NH(4)F) and 
      without modifier, using 5% CHF(3) (in argon) for cleaning the graphite furnace. 
      Good accuracy was obtained using aqueous Ti standards for calibration. A 
      homogeneity study showed that Ti was evenly distributed in all the samples at the 
      mg-microg level. The relative standard deviations (RSDs) obtained for the three 
      CRMs were 16%, 11%, and 8% ( n=30). In spite of the wide range of Ti 
      concentrations in the present samples, the same wavelength (365.4 nm) could be 
      used for analysis by varying the slurry sample concentration. The precision was 
      best for the material with the highest titanium content in spite of the fact that 
      only 3 microg of sample was introduced into the furnace.
FAU - Sorlie, Torunn Marie
AU  - Sorlie TM
AD  - Department of Chemistry, University of Oslo, P.O. Box 1033, 0315, Oslo, Norway.
FAU - Wibetoe, Grethe
AU  - Wibetoe G
LA  - eng
PT  - Journal Article
DEP - 20030516
PL  - Germany
TA  - Anal Bioanal Chem
JT  - Analytical and bioanalytical chemistry
JID - 101134327
EDAT- 2003/05/17 05:00
MHDA- 2003/05/17 05:01
CRDT- 2003/05/17 05:00
PHST- 2003/01/31 00:00 [received]
PHST- 2003/03/21 00:00 [revised]
PHST- 2003/03/24 00:00 [accepted]
PHST- 2003/05/17 05:00 [pubmed]
PHST- 2003/05/17 05:01 [medline]
PHST- 2003/05/17 05:00 [entrez]
AID - 10.1007/s00216-003-1938-6 [doi]
PST - ppublish
SO  - Anal Bioanal Chem. 2003 Jul;376(5):721-7. doi: 10.1007/s00216-003-1938-6. Epub 
      2003 May 16.