Suppressed electrostatic ion chromatography with tetraborate as eluent and its application to the determination of inorganic anions in snow and rainwater

2000 ◽  
Vol 884 (1-2) ◽  
pp. 161-165 ◽  
Author(s):  
Wenzhi Hu ◽  
Kazuhiko Tanaka ◽  
Paul R Haddad ◽  
Kyoshi Hasebe
2010 ◽  
Vol 48 (7) ◽  
pp. 553-558 ◽  
Author(s):  
H. Zhu ◽  
H. Chen ◽  
Y. Zhong ◽  
D. Ren ◽  
Y. Qian ◽  
...  

Author(s):  
Elena Yusenko ◽  
Evgeniya Polyntseva ◽  
Anna Lyzhova ◽  
Olga Kalyakina

Abstract Oxalate concentration differs in various daily consumed food products. The role of oxalic acid in the human body is very significant, as its compounds are responsible for the stability of biological membranes. However, insoluble calcium and magnesium oxalates can be accumulated in the body in the form of kidney stones. Oxalate concentration has been measured by high performance liquid, gas after derivatization and ion chromatography (IC). The most effective method for the simultaneous determination of oxalate and inorganic anions is ion chromatography with conductometric detection. Here, we report the results of the measurement of oxalic acid in bleak and green tea samples. Separation was performed by IC on an anion-exchange column Shodex IC SI-90 with surface-layer sorbent and conductimetric detection. The main analytical features of the method were: limit of detection of oxalic acid 0.03 mg/l, linear range 0.1-20 mg/l, correlation 0.9998, relative standard deviation 1%. The method did not need specific sample treatment and was successfully applied to the analysis of black and green tea samples. Oxalic acid was determined in the ranges 16.7-84 mg/l for green tea and 63-116 mg/l for black tea. Green tea contained lower oxalate ions concentration than black tea. The IC method has a lower detection limit for oxalate ions than HPLS and GC, ten and two times less, respectively


1999 ◽  
Vol 382 (3) ◽  
pp. 291-299 ◽  
Author(s):  
Maria Concetta Bruzzoniti ◽  
Edoardo Mentasti ◽  
Corrado Sarzanini

2019 ◽  
Vol 1063 ◽  
pp. 167-177 ◽  
Author(s):  
Estrella Sanz Rodriguez ◽  
Christopher Plummer ◽  
Meredith Nation ◽  
Andrew Moy ◽  
Mark Curran ◽  
...  

1984 ◽  
Vol 42 (2) ◽  
pp. 90-93 ◽  
Author(s):  
J. C. Jancar ◽  
M. D. Constant ◽  
W. C. Herwig

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