Determination of trace organophosphorus pesticides in water samples with TiO2 nanotubes cartridge prior to GC-flame photometric detection.
This article described a new method for the sensitive determination of organophosphorus pesticides in water samples using SPE in combination with GC-flame photometric detection. In the procedure of method development, TiO(2) nanotubes were used as SPE adsorbents for the enrichment of organophosphorus pesticides from water samples. Several factors, such as eluent and its volume, sample pH, sample volume, sample flow rate, and concentration of humic acid, were optimized. Under the optimal conditions, the proposed method had good linear ranges as 0.1-40 microg/L for each of them, LOD of 0.11, 0.014, and 0.0025 microg/L, and LOQs of 0.37, 0.047, and 0.0083 microg/L for chlorpyrifos, phorate, and methyl parathion, respectively. The proposed method was validated with real environmental water samples and the spiked recoveries were over the range of 86.5-115.1%. All these results indicated that TiO(2) nanotubes, as a new SPE adsorbent, would be used widespread for the preconcentration and determination of environmental pollutants in the future.
School of Chemistry and Environmental Sciences, Henan Normal University, Henan Key Laboratory for Environmental Pollution Control, Key Laboratory for Yellow River and Huaihe River Water Environment and Pollution Control, Ministry of Education, Xinxiang, P. R. China.
Yunrui
Y
Huang
Qingxiang
Q
Zhou
Junping
J
Xiao
Guohong
G
Xie
D002849:Chromatography, Gas / Q000379:methods*; D005410:Flame Ionization / Q000295:instrumentation / Q000379:methods*; D006812:Humic Substances; D006863:Hydrogen-Ion Concentration; D007477:Ions / Q000737:chemistry; D043942:Nanotubes / Q000737:chemistry*; D010755:Organophosphates / Q000032:analysis*; D010575:Pesticides / Q000032:analysis*; D014025:Titanium / Q000737:chemistry; D014867:Water / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*
D006812:Humic Substances; D007477:Ions; D010755:Organophosphates; D010575:Pesticides; D014874:Water Pollutants, Chemical; D014867:Water; C009495:titanium dioxide; D014025:Titanium