A new radiometric titration method based on separation by means of ion-exchange

1971 ◽  
Vol 7 (2) ◽  
pp. 261-269 ◽  
Author(s):  
A. Heijink ◽  
H. L. Polak
Keyword(s):  
Ion Exchange ◽  
Titration Method ◽  
Radiometric Titration

scholarly journals Analysis of Rocks by means of Ion-exchange Resins and Chelate-titration Method

1960 ◽  
Vol 66 (775) ◽  
pp. 195-201 ◽  
Author(s):  
Hidekata SHIBATA ◽  
Yasue OKI ◽  
Yutaro SAKAKIBARA
Keyword(s):  
Ion Exchange ◽  
Ion Exchange Resins ◽  
Titration Method ◽  
Exchange Resins

scholarly journals Analysis of Rocks by Means of Ion-exchange Resins and Chelate-titration Method(2)

1962 ◽  
Vol 68 (801) ◽  
pp. 329-333 ◽  
Author(s):  
Yasue OKI ◽  
Shohachiro OKI ◽  
Hidekata SHIBATA ◽  
Yutaro SAKAKIBARA
Keyword(s):  
Ion Exchange ◽  
Ion Exchange Resins ◽  
Titration Method ◽  
Exchange Resins

Preparation and Properties of Clays Pillared with Al2O3-NiO Mixed Oxide

1994 ◽  
Vol 371 ◽  
Author(s):  
Shoji Yamanaka ◽  
Hironori Yamamoto
Keyword(s):  
Ion Exchange ◽  
Specific Surface ◽  
Surface Area ◽  
Aluminum Hydroxide ◽  
Mixed Oxide ◽  
Nickel Hydroxide ◽  
Room Temperature ◽  
Microporous Structure ◽  
Titration Method ◽  
Na Ions

AbstractMontmorillonite was pillared with Al2O3-NiO mixed oxide by ion-exchange combined with titration process; the interlayer Na ions of montmorillonite were first exchanged with aluminum hydroxide polycations, and then nickel hydroxide was precipitated between the layers by a titration method. The aluminum hydroxide pillars reacted with the nickel hydroxide at room temperature, and the microporous structure was much stabilized against heating. The specific surface area as high as 300 m2/g was maintained up to 700°C.

scholarly journals Effects of Postharvest Storage on Cyanide Content and Activity of Partially Purified Rhodanese from Bitter Cassava (Manihot Utilissima) Tubers

2020 ◽  
Vol 3 (2) ◽  
pp. 157
Author(s):  
Emmanuel Sina Akintimehin ◽  
Foluso Olutope Adetuyi ◽  
Kayode Olayele Karigidi ◽  
Raphael Emuebie Okonji ◽  
Clement Olomola Akinnubi
Keyword(s):  
Ion Exchange ◽  
Specific Activity ◽  
Ion Exchange Chromatography ◽  
Exchange Chromatography ◽  
Optimum Temperature ◽  
Postharvest Storage ◽  
Titration Method ◽  
Optimum Ph ◽  
Bitter Cassava ◽  
Cyanide Content

This research investigated the effects of postharvest storage on cyanide content and rhodanese isolated from bitter cassava (Manihot Utilissima) tubers. Cyanide content of freshly harvested sample, samples stored for 4 days and samples stored for 8 days were estimated by silver nitrate titration method. Rhodanese was purified using 80% ammonium sulphate precipitate and ion-exchange chromatography on CM-Sephadex C-25.Cyanide content from freshly harvested sample was 345.6 mg HCN/kg while 237.6 mg HCN/kg and 108 mg HCN/kg were obtained for samples stored for 4 days and samples stored for 8 days respectively. Specific activity of rhodanese from freshly harvested sample was 3.411 RU/mg while 5.92 RU/mg and 5.35 RU/mg were obtained for samples stored for 4 days and samples stored for 8 days respectively. The Km values of rhodanese for KCN were 3.18 mM, 2.40 mM, 0.25 mM for freshly harvested sample, samples stored for 4 days and samples stored for 8 days respectively. The optimum temperature from freshly harvested sample and sample stored for 4 days was 70 0C while samples stored for 8 days was 50 0C. An optimum pH of 4.0 was obtained from the 3 samples.Rhodanese play plausible role in cyanide reduction during the postharvest storage.

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