科研之友
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摘要
In this work a cloud-point extraction has been used for the preconcentration of the trace amounts of titanium after complex formation with morin (2',3,4',5,7-pentahydroxyflavone) using Triton X-114 as surfactant. The chemical variables affecting the phase separation and the viscosity affecting the detection by flame atomic absorption spectrometry (FAAS) were optimized. At pH 4.5, preconcentration of 50 mL of sample in the presence of 0.08% Triton X-114 and 1.0 x 10(-4) M morin enabled the detection limit (c (L) = 3S (b)/m) of 2.9 ng/mL titanium and linear range 0.02-2.0 mu g/mL to be achived. The preconcentration factor was 61, and the relative standard deviation was 3.8% for 0.1 mu g/mL solution of Ti(IV) by repeated assays (n = 9). The proposed method has been applied to the determination of titanium in well water, spiked water and plant (Haloxylon).
- 出版日期2013-7
