A型ゼオライトの陽イオン交換特性および原子吸光・炎光分析における電荷バランス [in Japanese] Cation Exchange Characters of A-type Zeolites and Charge Balances in Atomic Absorption and Flame Photometric Analyses [in Japanese]
Access this Article
Search this Article
Cation-exchange treatments of a Na-A zeolite under various conditions have carried out to clarify exchange characteristics. Repeated cation exchange treatments using the diluted 0.1M cation solution gave more exchange amount than that by one-time treatment using the concentrated 2M-solution prepared with various cations such as Mg2+, Ca2+, Co2+ or Ni2+. As illegal charge balances were often obtained from analyses of zeolites by the atomic absorption spectrophotometry and the flame photometry, possible chemical interferences were examined for all of related substances. Althongh the concentration of HF was found to give negative interference to the absorbances of both Al and Si, the influence is rather serious in determination of Al content. Matching of HF concentrations between sample and standard solutions is thus very important to obtain regular values of the charge balances. Another interference to be reminded is the enhancement of emission for K by the existence of Si as well as of Na. Considering above mentioned interferences, the deviations of charge balances in zeolite analyses were depressed below 2 % or less by using the atomic absorption and flame photometoric methods.
- Journal of MMIJ
Journal of MMIJ 114(8), 561-566, 1998-08-25
The Mining and Materials Processing Institute of Japan