A novel procedure for separating iron from geological materials for isotopic analysis using MC-ICP-MS

2020 ◽  
Vol 35 (5) ◽  
pp. 873-877
Author(s):  
Guanhong Zhu ◽  
Jinlong Ma ◽  
Gangjian Wei ◽  
Yajun An
Keyword(s):  
Cation Exchange ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Isotopic Analysis ◽  
Simple Method ◽  
Geological Materials ◽  
Icp Ms ◽  
Single Column

A simple method was developed for achieving Fe separation and involved the use of a single column packed with AGMP-50 cation-exchange resin.

scholarly journals Determination ofMagnesium Stearate in Capsule- or Tablet-Type Supplements

2006 ◽  
Vol 89 (2) ◽  
pp. 458-461 ◽  
Author(s):  
Yoko Uematsu ◽  
Mami Ogimoto ◽  
Junichirou Kabashima ◽  
Kouichi Ito ◽  
Kazuo Yasuda
Keyword(s):  
Gas Chromatography ◽  
Stearic Acid ◽  
Cation Exchange ◽  
Acid Concentration ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Magnesium Stearate ◽  
Positive Error ◽  
Simple Method

Abstract A simple method for the determination of magnesium stearate in capsule- or tablet-type supplements was developed. Free stearic acid in the sample was removed by extraction with tetrahydrofuran. The remaining stearate was converted to stearic acid by reaction with a cation-exchange resin. The resulting stearic acid was determined by gas chromatography with a polar column. Esters of stearic acid were not converted to stearic acid and would not cause a positive error in the amount of stearate. The amount of magnesium stearate was calculated based on the stearic acid concentration thus obtained. Magnesium stearate levels in 5 out of 25 supplements exceeded 2500 g/g, which indicated the possible admixture of magnesium stearate.

scholarly journals Separation of matrine and oxymatrine from Sophora flavescens extract through cation exchange resin coupled with macroporous absorption resin

2016 ◽  
Vol 18 (2) ◽  
pp. 31-39 ◽  
Author(s):  
Haohao Chen ◽  
Shaojian Luo ◽  
Xikang Zheng ◽  
Huajun Fan
Keyword(s):  
Cation Exchange ◽  
Crude Extract ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Freundlich Isotherm ◽  
Sophora Flavescens ◽  
Macroporous Resin ◽  
Foreign Matter ◽  
Simple Method ◽  
Adsorption Data

Abstract A simple method for separation of matrine and oxymatrine from Sophora flavescens was developed with cation exchange resin coupled with macroporous resin. Based on the adsorption characteristics of matrine and oxymatrine, 001×732 cation exchange resin was used to absorb target alkaloids for removing most of the foreign matter, while BS-65 macroporous resin was chosen to purify these alkaloids. The result showed that the equilibrium adsorption data of matrine and oxymatrine on 001×732 resin and BS-65 resin at 30°C was fitted to Langmuir isotherm and Freundlich isotherm, respectively. The contents of matrine and oxymatrine were increased from 0.73% and 2.2% in the crude extract of the root of Sophora flavescens to 67.2% and 66.8% in the final eluent products with the recoveries of 90.3% and 86.9%, respectively.

scholarly journals A Safe and Simple Method of Blood Collection for Transfusion Utilizing a Cation Exchange Resin

1958 ◽  
Vol 147 (1) ◽  
pp. 69-74 ◽  
Author(s):  
Hillary A. Chollet ◽  
Roy H. Clauss ◽  
Salvatore G. Giannini ◽  
William F. MacFee
Keyword(s):  
Cation Exchange ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Blood Collection ◽  
Simple Method

scholarly journals A Rapid and Simple Method for Lithium Purification and Isotopic Analysis of Geological Reference Materials by MC-ICP-MS

2020 ◽  
Vol 8 ◽  
Author(s):  
Guanhong Zhu ◽  
Jinlong Ma ◽  
Gangjian Wei ◽  
Le Zhang
Keyword(s):  
Reference Materials ◽  
Isotopic Analysis ◽  
Matrix Elements ◽  
Simple Method ◽  
Isotopic Compositions ◽  
Icp Ms ◽  
Single Column ◽  
Li Isotope ◽  
Column Procedure ◽  
Isotope Measurements

A simple method has been developed to purify lithium (Li) from matrix elements in geological reference materials, using a single-column packed with AGMP-50 cation exchange resin, followed by high-precision Li isotope measurements by multi-collector inductively coupled plasma mass spectrometry (MC-ICP-MS). A series of tests, such as different types of resin, loading amount of Li, loading volumes, and various eluents, were conducted to ascertain the optimal conditions for Li purification and the effects of intensity, acidity, and presence of potential matrix elements on Li isotope measurements were also evaluated. In our experiment, Al and high-field-strength elements (HFSEs), such as Ti, Zr, and Hf, were eluted by 0.2 M HCl + 0.3 M HF, and 0.73 M HCl was used to separate Li from other matrix elements, such as Na. This method is suitable for processing large amount of Li (60–270 ng) and enabling a Li recovery of close to 100%, with effective removal of matrix elements such as Na and Ca. Besides, our method achieves low matrix interferences (e.g., Na/Li << 1 and Ca/Li << 1 for rock and seawater via a single-column procedure; Ca/Li < 2 for carbonate via a two-column procedure) and also uses small volume of eluents and is rapid (~5 h), enabling a total separation to be completed in ~0.5 d. Using this method, we report Li isotopic compositions of various geological reference materials, including igneous rocks, seawater, and carbonate. The Li isotopic compositions are consistent with the data published previously for the analyzed reference materials. As such, the reported method is ideally suited for Li separation from multiple types of geological samples prior to isotopic analysis.

scholarly journals Single-step separation scheme and high-precision isotopic ratios analysis of Sr–Nd–Hf in silicate materials

2014 ◽  
Vol 29 (8) ◽  
pp. 1467-1476 ◽  
Author(s):  
Chao-Feng Li ◽  
Jing-Hui Guo ◽  
Yue-Heng Yang ◽  
Zhu-Yin Chu ◽  
Xuan-Ce Wang
Keyword(s):  
Cation Exchange ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Single Step ◽  
Isotopic Ratios ◽  
Separation Scheme ◽  
Geological Samples ◽  
Icp Ms ◽  
One Step ◽  
Silicate Materials

One-step separation route based on AG50W-X12 cation-exchange resin and LN Spec extraction chromatographic material for purification of Sr–Nd–Hf from geological samples followed by TIMS and MC-ICP-MS.

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