Fluorous Synthesis with Fewer Fluorines (Light Fluorous Synthesis):  Separation of Tagged from Untagged Products by Solid-Phase Extraction with Fluorous Reverse-Phase Silica Gel

1999 ◽  
Vol 121 (39) ◽  
pp. 9069-9072 ◽  
Author(s):  
Dennis P. Curran ◽  
Zhiyong Luo
Keyword(s):  
Solid Phase Extraction ◽  
Silica Gel ◽  
Solid Phase ◽  
Phase Extraction ◽  
Reverse Phase ◽  
Fluorous Synthesis

Tris(2-aminoethyl) amine functionalized silica gel for solid-phase extraction and preconcentration of Cr(III), Cd(II) and Pb(II) from waters

2008 ◽  
Vol 157 (1) ◽  
pp. 154-160 ◽  
Author(s):  
Xinping Huang ◽  
Xijun Chang ◽  
Qun He ◽  
Yuemei Cui ◽  
Yunhui Zhai ◽  
...  
Keyword(s):  
Solid Phase Extraction ◽  
Silica Gel ◽  
Solid Phase ◽  
Phase Extraction ◽  
Functionalized Silica ◽  
Amine Functionalized

Molecularly Imprinted Layer-Coated Silica Gel Particles for Selective Solid-Phase Extraction of Pefloxacin and Enrofloxacin from Milk Samples

2012 ◽  
Vol 6 (5) ◽  
pp. 1361-1369 ◽  
Author(s):  
Xiulan Sun ◽  
Xiumei Tian ◽  
Yinzhi Zhang ◽  
Yanjie Tang
Keyword(s):  
Solid Phase Extraction ◽  
Silica Gel ◽  
Solid Phase ◽  
Phase Extraction ◽  
Molecularly Imprinted ◽  
Milk Samples ◽  
Gel Particles ◽  
Silica Gel Particles

scholarly journals Solid-Phase Extraction and Reverse-Phase HPLC: Application to Study the Urinary Excretion Pattern of Benzophenone-3 and its Metabolite 2,4-Dihydroxybenzophenone in Human Urine

2008 ◽  
Vol 3 ◽  
pp. ACI.S396 ◽  
Author(s):  
Helena Gonzalez ◽  
Carl-Eric Jacobson ◽  
Ann-Marie Wennberg ◽  
Olle Larkö ◽  
Anne Farbrot
Keyword(s):  
Solid Phase Extraction ◽  
Urinary Excretion ◽  
Human Urine ◽  
Solid Phase ◽  
Whole Body ◽  
Phase Extraction ◽  
Reverse Phase Hplc ◽  
Reverse Phase ◽  
Excretion Pattern ◽  
Relative Standard

Background Benzophenone-3 (BZ-3) is a common ultraviolet (UV) absorbing compound in sunscreens. It is the most bioavailable species of all UV-absorbing compounds after topical application and can be found in plasma and urine. Objectives The aim of this study was to develop a reverse-phase high performance liquid chromatography (HPLC) method for determining the amounts BZ-3 and its metabolite 2,4-dihydroxybenzophenone (DHB) in human urine. The method had to be suitable for handling a large number of samples. It also had to be rapid and simple, but still sensitive, accurate and reproducible. The assay was applied to study the urinary excretion pattern after repeated whole-body applications of a commercial sunscreen, containing 4% BZ-3, to 25 healthy volunteers. Methods Each sample was analyzed with regard to both conjugated/non-conjugated BZ-3 and conjugated/non-conjugated DHB, since both BZ-3 and DHB are extensively conjugated in the body. Solid-phase extraction (SPE) with C8 columns was followed by reverse-phase HPLC. For separation a Genesis C18 column was used with an acethonitrile-water mobile phase and the UV-detector was set at 287 nm. Results The assay was linear r 2 > 0.99, with detection limits for BZ-3 and DHB of 0.01 µmol L-1 and 0.16 µmol L-1 respectively. Relative standard deviation (RSD) was less than 10% for BZ-3 and less than 13% for DHB. The excretion pattern varied among the human volunteers; we discerned different patterns among the individuals. Conclusions The reverse-phase HPLC assay and extraction procedures developed are suitable for use when a large number of samples need to be analyzed and the method fulfilled our objectives. The differences in excretion pattern may be due to differences in enzyme activity but further studies, especially about genetic polymorphism, need to be performed to verify this finding.

Silica gel surface modified with sulfanilamide for selective solid-phase extraction of Cu(II), Zn(II) and Ni(II)

2009 ◽  
Vol 89 (14) ◽  
pp. 1043-1055 ◽  
Author(s):  
Xiaojun Zou ◽  
Yuemei Cui ◽  
Xijun Chang ◽  
Xiangbing Zhu ◽  
Zheng Hu ◽  
...  
Keyword(s):  
Solid Phase Extraction ◽  
Silica Gel ◽  
Solid Phase ◽  
Phase Extraction ◽  
Surface Modified

An investigation of the effects of carbon loading and endcapping on the solid-phase extraction of β-blockers onto C18 bonded silica gel

1993 ◽  
Vol 11 (8) ◽  
pp. 671-677 ◽  
Author(s):  
P. Martin ◽  
J. Taberner ◽  
A. Fairbrother ◽  
I.D. Wilson
Keyword(s):  
Solid Phase Extraction ◽  
Silica Gel ◽  
Solid Phase ◽  
Phase Extraction ◽  
Β Blockers ◽  
Carbon Loading

Silica Gel‐Immobilized 5‐aminoisophthalohydrazide: A novel sorbent for solid phase extraction of Cu, Zn and Pb from natural water samples

2020 ◽  
Vol 34 (4) ◽  
Author(s):  
Funda Aydin ◽  
Reşit Çakmak ◽  
Abdulkadir Levent ◽  
Mustafa Soylak
Keyword(s):  
Solid Phase Extraction ◽  
Silica Gel ◽  
Natural Water ◽  
Water Samples ◽  
Solid Phase ◽  
Phase Extraction ◽  
Natural Water Samples
Sign in / Sign up

Export Citation Format

Share Document