Preparation of cyano-functionalized multiwalled carbon nanotubes as solid-phase extraction sorbent for preconcentration of phenolic compounds in environmental water

2012 ◽  
Vol 35 (15) ◽  
pp. 1967-1976 ◽  
Author(s):  
Wenhua Gao ◽  
Ximeng Sun ◽  
Tufeng Chen ◽  
Yuejuan Lin ◽  
Yaowen Chen ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Phenolic Compounds ◽  
Solid Phase Extraction ◽  
Multiwalled Carbon Nanotubes ◽  
Solid Phase ◽  
Environmental Water ◽  
Phase Extraction ◽  
Multiwalled Carbon ◽  
Functionalized Multiwalled Carbon Nanotubes ◽  
As Solid Phase

Preconcentration of atrazine and simazine with multiwalled carbon nanotubes as solid-phase extraction disk

2010 ◽  
Vol 96 (2) ◽  
pp. 348-351 ◽  
Author(s):  
Hideyuki Katsumata ◽  
Hiroshi Kojima ◽  
Satoshi Kaneco ◽  
Tohru Suzuki ◽  
Kiyohisa Ohta
Keyword(s):  
Carbon Nanotubes ◽  
Solid Phase Extraction ◽  
Multiwalled Carbon Nanotubes ◽  
Solid Phase ◽  
Phase Extraction ◽  
Multiwalled Carbon ◽  
As Solid Phase

Preconcentration of diazinon using multiwalled carbon nanotubes as solid-phase extraction adsorbents

2008 ◽  
Vol 88 (1) ◽  
pp. 82-86 ◽  
Author(s):  
Hideyuki Katsumata ◽  
Tomohiro Matsumoto ◽  
Satoshi Kaneco ◽  
Tohru Suzuki ◽  
Kiyohisa Ohta
Keyword(s):  
Carbon Nanotubes ◽  
Solid Phase Extraction ◽  
Multiwalled Carbon Nanotubes ◽  
Solid Phase ◽  
Phase Extraction ◽  
Multiwalled Carbon ◽  
As Solid Phase

Arsenic Speciation Analysis in Environmental Water by HG-AFS after Solid-Phase Extraction Using Multiwalled Carbon Nanotubes

2010 ◽  
Vol 113-116 ◽  
pp. 76-80 ◽  
Author(s):  
Xian Zhong Cheng ◽  
Xue Fang Sun ◽  
Cun Jie Hu ◽  
Chao Chang
Keyword(s):  
Carbon Nanotubes ◽  
Solid Phase Extraction ◽  
Multiwalled Carbon Nanotubes ◽  
Solid Phase ◽  
Inorganic Arsenic ◽  
Arsenic Species ◽  
Environmental Water ◽  
Phase Extraction ◽  
Multiwalled Carbon ◽  
Inorganic Arsenic Species

A simple, inexpensive, and sensitive method was developed for the determination of inorganic arsenic species As(III), As(V) and total arsenic in environmental water samples using multiwalled carbon nanotubes (MWCNTs) as solid phase extraction (SPE) adsorbents coupled with hydride generation atomic fluorescence spectrometry (HG-AFS). The procedure is based on selectively absorbance of the chelates of As(III)-ammonium pyrrolidine dithiocarbamate (APDC) on the MWCNTs at pH range of 2.0-5.0, while As(V) was passed through the microcolumn. The retention complexes of As(III)-APDC was eluted completely with 3 mL of 2.0 mol L-1 HCl solution at a flow rate 1.0 mL min-1, and then directly determined by HG-AFS. The effluent of As(V) was determined using thiourea and ascorbic acid as reducing agent for reduce As(V) to As(III). The different parameters that control the preconcention/separation step of As(III) and As(V) and determination have been investigated in detail. Under the optimized conditions, a linear range of 0.03-10.0 ng mL-1 for As(III), along with a detection limits of 0.0026 ng mL-1, and the relative standard deviations for As(III) and As(V) for 0.28-6.30%, were obtained. The proposed method was applied for the analysis of inorganic arsenic species in groundwater and lake water with the recovery of 98.00-102.0%.

Sign in / Sign up

Export Citation Format

Share Document