Flow-injection determination of low levels of ammonium ions in natural waters employing preconcentration with a cation-exchange resin

1992 ◽  
Vol 261 (1-2) ◽  
pp. 339-343 ◽  
Author(s):  
Menezes Santos Filha Marina ◽  
Boaventura Freire dos Reis ◽  
Henrique Bergamin Fo. ◽  
Nivaldo Baccan
Keyword(s):  
Cation Exchange ◽  
Flow Injection ◽  
Natural Waters ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Ammonium Ions ◽  
Low Levels

An improved separation scheme for Sr through fluoride coprecipitation combined with a cation-exchange resin from geological samples with high Rb/Sr ratios for high-precision determination of Sr isotope ratios

2020 ◽  
Vol 35 (5) ◽  
pp. 953-960
Author(s):  
Wen-Gang Liu ◽  
Shuang Wei ◽  
Jian Zhang ◽  
Cong Ao ◽  
Fu-Tian Liu ◽  
...  
Keyword(s):  
Cation Exchange ◽  
High Precision ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Separation Scheme ◽  
Geological Samples ◽  
Sr Isotope ◽  
Precision Determination ◽  
High Precision Determination

A new separation method for Sr involving HF coprecipitation combined with AG50 resin from samples with high Rb/Sr ratios.

Ion Exchange Method for Rapid Determination of Alkalinity of Water-Soluble Tea Ash Containing High Levels of Manganese

1980 ◽  
Vol 63 (3) ◽  
pp. 460-461
Author(s):  
Saidul Z Qureshi ◽  
Fadhil M Najib ◽  
Fahmi A Mohammed
Keyword(s):  
Ion Exchange ◽  
Cation Exchange ◽  
Exchange Resin ◽  
Rapid Determination ◽  
Cation Exchange Resin ◽  
Water Soluble ◽  
Exchange Method ◽  
Strong Cation Exchange ◽  
Ion Exchange Method

Abstract An ion exchange method to determine the alkalinity of water-soluble tea ash containing high levels of manganese is described. A chromatographic column containing a strong cation exchange resin (20–50 mesh) in Na+ form, with a bed volume of 5 mL is used. The present ion exchange method is compared to pH titrations and also to the official AOAC methods (31.012, 31.015, 31.016). Results with the new method are accurate and precise.

Different approaches to the determination of ammonium ions at low levels by flow injection analysis

1988 ◽  
Vol 214 ◽  
pp. 121-136 ◽  
Author(s):  
G. Schulze ◽  
C.Y. Liu ◽  
M. Brodowski ◽  
O. Elsholz ◽  
W. Frenzel ◽  
...  
Keyword(s):  
Flow Injection ◽  
Flow Injection Analysis ◽  
Ammonium Ions ◽  
Low Levels
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