PMID- 29777525
OWN - NLM
STAT- MEDLINE
DCOM- 20190211
LR  - 20190215
IS  - 1559-0720 (Electronic)
IS  - 0163-4984 (Linking)
VI  - 186
IP  - 2
DP  - 2018 Dec
TI  - Preconcentration and Determination of Trace Nickel and Cobalt in Milk-Based 
      Samples by Ultrasound-Assisted Cloud Point Extraction Coupled with Flame Atomic 
      Absorption Spectrometry.
PG  - 597-607
LID - 10.1007/s12011-018-1337-7 [doi]
AB  - In this study, ultrasound-assisted cloud point extraction (UA-CPE) method was 
      developed for the determination of Ni(II) and Co(II) in milk-based products. 
      After extraction and preconcentration, the Ni(II) and Co(II) contents of samples 
      were determined by flame atomic absorption spectrometry (FAAS). After their 
      complexation with hydroxy naphthol blue (HNB) in the presence of cationic 
      surfactant, CTAB at pH 4.0, the Ni(II) and Co(II) were taken within the micellar 
      phase of nonionic surfactant, TX-114. The micellar phase containing the analytes 
      were diluted to a volume of 0.7 mL with 1.0-mol/L HNO(3) in ethanol to reduce its 
      viscosity and to facilitate sample treatment and then was analyzed by FAAS. The 
      various analytical parameters affecting UA-CPE efficiency were investigated. The 
      analytical features obtained after optimization are as follows: limits of 
      detection are 0.56 and 0.78 mug/L; sensitivity enhancement factors are 48.6 and 
      53.9; the calibration curves were linear 3-180 and 2-160 mug/L for Co(II) and 
      Ni(II), respectively, after preconcentration of 50-fold. The precision (as RSD%) 
      between 1.8-3.6% and 2.2-3.8% (25 and 100 mug/L, n = 5) for Ni(II) and Co(II), 
      respectively. The accuracy was statistically verified by analysis of two 
      certified reference material samples (CRMs), including recovery studies after 
      spiking. The method was applied to the analysis of milk-based samples with 
      satisfied results.
FAU - Temel, Nuket Kartal
AU  - Temel NK
AUID- ORCID: 0000-0002-3539-4930
AD  - Faculty of Sciences, Department of Chemistry/Analytical Chemistry, University of 
      Cumhuriyet, TR-58140, Sivas, Turkey. nkartal@cumhuriyet.edu.tr.
FAU - Sertakan, Kadriye
AU  - Sertakan K
AD  - Faculty of Sciences, Department of Chemistry/Analytical Chemistry, University of 
      Cumhuriyet, TR-58140, Sivas, Turkey.
FAU - Gurkan, Ramazan
AU  - Gurkan R
AD  - Faculty of Sciences, Department of Chemistry/Analytical Chemistry, University of 
      Cumhuriyet, TR-58140, Sivas, Turkey.
LA  - eng
PT  - Journal Article
DEP - 20180518
PL  - United States
TA  - Biol Trace Elem Res
JT  - Biological trace element research
JID - 7911509
RN  - 0 (Surface-Active Agents)
RN  - 0 (Trace Elements)
RN  - 3G0H8C9362 (Cobalt)
RN  - 7OV03QG267 (Nickel)
SB  - IM
MH  - Animals
MH  - Cobalt/*analysis/isolation & purification
MH  - Hydrogen-Ion Concentration
MH  - Milk/*chemistry
MH  - Nickel/*analysis/isolation & purification
MH  - Osmolar Concentration
MH  - Reproducibility of Results
MH  - Spectrophotometry, Atomic/*methods
MH  - Surface-Active Agents/chemistry
MH  - Trace Elements/*analysis/isolation & purification
OTO - NOTNLM
OT  - Cobalt
OT  - FAAS
OT  - Hydroxy naphthol blue
OT  - Milk-based products
OT  - Nickel
OT  - TX-114
OT  - UA-CPE
EDAT- 2018/05/20 06:00
MHDA- 2019/02/12 06:00
CRDT- 2018/05/20 06:00
PHST- 2018/03/15 00:00 [received]
PHST- 2018/04/05 00:00 [accepted]
PHST- 2018/05/20 06:00 [pubmed]
PHST- 2019/02/12 06:00 [medline]
PHST- 2018/05/20 06:00 [entrez]
AID - 10.1007/s12011-018-1337-7 [pii]
AID - 10.1007/s12011-018-1337-7 [doi]
PST - ppublish
SO  - Biol Trace Elem Res. 2018 Dec;186(2):597-607. doi: 10.1007/s12011-018-1337-7. 
      Epub 2018 May 18.