PMID- 18968050
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20121002
LR  - 20190729
IS  - 1873-3573 (Electronic)
IS  - 0039-9140 (Linking)
VI  - 52
IP  - 5
DP  - 2000 Aug 16
TI  - Micellar colorimetric determination of iron, cobalt, nickel and copper using 
      1-nitroso-2-naphthol.
PG  - 893-902
AB  - 1-Nitroso-2-naphthol, an excellent color-forming chelating agent, combines to 
      Fe(III), Co(II), Ni(II), Cu(II) and so on to form slightly soluble complexes in 
      aqueous solution. To determine these metal ions, a tedious and time consuming 
      separation technique, such as liquid-liquid extraction, has often been performed. 
      However, these metal-1-nitroso-2-naphthol complexes could be determined 
      conveniently by ultraviolet-visible (UV-Vis) spectrophotometry in Tween 80 
      micellar medium that has polyoxyethylene groups. After conditions such as pH, the 
      amount of 1-nitroso-2-naphthol and the stability were adjusted to their optimum 
      values, the sensitivities of the metal ions in Tween 80 medium and in chloroform 
      were compared. It was shown that the sensitivities of Fe(III) and Co(II) in Tween 
      80 medium were higher than in chloroform, but that of Cu(II) was lower. The 
      interfering effects among analytes ions, Fe(III), Co(II), Ni(II) and Cu(II) were 
      more serious than by other ions, but the interfering effects could be removed by 
      adjusting pH or adding the masking agents such as NH(3) or oxalate. Detection 
      limits of Fe(III), Co(II), Ni(II), and Cu(II) were 0.024, 0.016, 0.039 and 0.023 
      mug ml(-1), respectively, and the correlation coefficients of these calibration 
      curves were above 0.996. Recovery yields of the metal ions in the mixed standard 
      solution ranged from 96 to 103%, and their coefficients of variation were low 
      ranging between 0.94 and 1.75%. Cu(II) in brass sample and the amount of Fe(III) 
      in steel sample were also determined. This proposed technique is simple, 
      convenient and speedy.
FAU - Yun, J
AU  - Yun J
AD  - Department of Chemistry, The University of Suwon, Suwon, 445-743, South Korea.
FAU - Choi, H
AU  - Choi H
LA  - eng
PT  - Journal Article
PL  - Netherlands
TA  - Talanta
JT  - Talanta
JID - 2984816R
EDAT- 2008/10/31 09:00
MHDA- 2008/10/31 09:01
CRDT- 2008/10/31 09:00
PHST- 1999/12/20 00:00 [received]
PHST- 2000/05/02 00:00 [revised]
PHST- 2000/05/11 00:00 [accepted]
PHST- 2008/10/31 09:00 [pubmed]
PHST- 2008/10/31 09:01 [medline]
PHST- 2008/10/31 09:00 [entrez]
AID - S0039-9140(00)00441-0 [pii]
AID - 10.1016/s0039-9140(00)00441-0 [doi]
PST - ppublish
SO  - Talanta. 2000 Aug 16;52(5):893-902. doi: 10.1016/s0039-9140(00)00441-0.