scholarly journals Mass-producible disposable needle-type ion-selective electrodes for plant research

RSC Advances ◽  
2019 ◽  
Vol 9 (52) ◽  
pp. 30309-30316
Author(s):  
Md. Abunasar Miah ◽  
Yusei Nakagawa ◽  
Ryo Tanimoto ◽  
Rina Shinjo ◽  
Motohiko Kondo ◽  
...  
Keyword(s):  
Indirect Measurement ◽  
Ion Selective Electrodes ◽  
Ion Concentrations ◽  
Needle Type ◽  
Plant Research ◽  
Disposable Needle

Easily mass-producible needle-type ion-selective electrodes were developed for the direct and indirect measurement of ion concentrations in live plants.

scholarly journals Ion selective electrodes are not suitable for measurements of silver ion concentrations in alkaline carbonate media

2013 ◽  
Vol 5 (4) ◽  
pp. 1068 ◽  
Author(s):  
Jonas Hedberg ◽  
Troy A. Lowe ◽  
Susanna Wold ◽  
Inger Odnevall Wallinder
Keyword(s):  
Silver Ion ◽  
Ion Selective Electrodes ◽  
Ion Concentrations ◽  
Alkaline Carbonate

Use of vent stack temperature as a feedforward variable for dissolver total titratable alkali (TTA) control

TAPPI Journal ◽  
2018 ◽  
Vol 17 (05) ◽  
pp. 261-269
Author(s):  
Wei Ren ◽  
Brennan Dubord ◽  
Jason Johnson ◽  
Bruce Allison
Keyword(s):  
Feedback Control ◽  
Current Practice ◽  
Feedforward Control ◽  
Control Variable ◽  
Indirect Measurement ◽  
Tight Control ◽  
Transfer Lines ◽  
Green Liquor ◽  
Process Dynamics ◽  
Downstream Processes

Tight control of raw green liquor total titratable alkali (TTA) may be considered an important first step towards improving the overall economic performance of the causticizing process. Dissolving tank control is made difficult by the fact that the unknown smelt flow is highly variable and subject to runoff. High TTA variability negatively impacts operational costs through increased scaling in the dissolver and transfer lines, increased deadload in the liquor cycle, under- and over-liming, increased energy consumption, and increased maintenance. Current practice is to use feedback control to regulate the TTA to a target value through manipulation of weak wash flow while simultaneously keeping dissolver density within acceptable limits. Unfortunately, the amount of variability reduction that can be achieved by feedback control alone is fundamentally limited by the process dynamics. One way to improve upon the situation would be to measure the smelt flow and use it as a feedforward control variable. Direct measurement of smelt flow is not yet possible. The use of an indirect measurement, the dissolver vent stack temperature, is investigated in this paper as a surrogate feedforward variable for dissolving tank TTA control. Mill trials indicate that significant variability reduction in the raw green liquor TTA is possible and that the control improvements carry through to the downstream processes.

Ion-Selective Electrodes

1975 ◽  
Vol 95 (4-6) ◽  
pp. 333-334
Author(s):  
R. Wachter
Keyword(s):  
Ion Selective Electrodes
Sign in / Sign up

Export Citation Format

Share Document