PMID- 25989689
OWN - NLM
STAT- MEDLINE
DCOM- 20150901
LR  - 20190923
IS  - 1000-8713 (Print)
IS  - 1000-8713 (Linking)
VI  - 33
IP  - 2
DP  - 2015 Feb
TI  - [Simultaneous determination of three inorganic anions in food-grade lubricating 
      oils by chromatography with suppressed conductivity detection].
PG  - 164-8
AB  - An ion chromatographic (IC) method with suppressed conductivity detection was 
      developed for the simultaneous determination of Cl-, NO3(-), SO(2-)(4) in 
      food-grade lubricating oils. After ultrasonic extraction with 50% (v/v) methanol 
      aqueous solution and centrifugation, the sample in aqueous phase was purified 
      with 0. 22 microm hybrid fiber membranes, then analyzed by IC using 15 mmol/L KOH 
      solution as eluent, and detected by a suppressed conductivity detector. Effects 
      of the concentration and flow rate of the eluent, and the concentration of the 
      methanol aqueous solution on the detection of the three anions were investigated. 
      Under the optimized separation conditions, the three anions were separated 
      completely and the system peaks didn't interfere with the determination. The 
      calibration curves showed good linearity (R2> 0. 999) in the range of 0. 10-20. 
      00 mg/L. The limits of detection (LODs, S/N= 3) were 0. 01 - 0. 03 mg/kg. The 
      average recoveries of Cl-, NO(-)3, SO(2-)4 anions were 90. 0% - 103. 6% with the 
      relative standard deviations (RSDs) of 2. 8% - 5. 7%. This method avoids the 
      time-consuming pretreatment process to burn or ash the oil phase matrix, and can 
      determine the amounts of three inorganic anions (Cl-, NO(-)3, SO(2-)(4)) in 
      food-grade lubricating oils fast and accurately. It is suitable for 
      simultaneously separating and detecting trace inorganic anions in lubricating 
      oils or other oil products.
FAU - Zhang, Liyuan
AU  - Zhang L
FAU - Fei, Xudong
AU  - Fei X
FAU - Qiu, Feng
AU  - Qiu F
FAU - Lin, Miao
AU  - Lin M
LA  - chi
PT  - Journal Article
PL  - China
TA  - Se Pu
JT  - Se pu = Chinese journal of chromatography
JID - 9424804
RN  - 0 (Anions)
RN  - 0 (Oils)
SB  - IM
MH  - Anions/*analysis
MH  - Chromatography, Ion Exchange
MH  - Oils/*chemistry
EDAT- 2015/05/21 06:00
MHDA- 2015/09/02 06:00
CRDT- 2015/05/21 06:00
PHST- 2015/05/21 06:00 [entrez]
PHST- 2015/05/21 06:00 [pubmed]
PHST- 2015/09/02 06:00 [medline]
AID - 10.3724/sp.j.1123.2014.10009 [doi]
PST - ppublish
SO  - Se Pu. 2015 Feb;33(2):164-8. doi: 10.3724/sp.j.1123.2014.10009.