Chemical resistance of glass used in the production of laboratory glassware. Methods for determination of hydrolytic resistance ofthe interior surfaces of glass containers

2015 ◽  
1982 ◽  
Vol 65 (1) ◽  
pp. 71-75
Author(s):  
John Murray ◽  
Alister S McGill

Abstract Histamine is rapidly adsorbed on the surface of glass containers when stored in aqueous or 10% methanol solution at ambient or sub-zero temperatures. This effect can lead to marked errors in the determination of histamine. Addition of acid to the holding medium or storage in polyethylene containers eliminates this effect


Proceedings ◽  
2018 ◽  
Vol 2 (13) ◽  
pp. 869 ◽  
Author(s):  
Raquel Pruna ◽  
Francisco Palacio ◽  
Isabel Fuentes ◽  
Clara Viñas ◽  
Francesc Teixidor ◽  
...  

A novel transparent and nanostructured ion-sensitive electrode based on indium tin oxide (ITO) coated with cobaltbis(dicarbollide)-doped poly(pyrrole) (PPy) is presented in this work. This metallacarborane-doped PPy was used as conducting polymer due to its high stability and chemical resistance. The ion-sensitive electrode was coupled to a miniaturized and low-cost potentiostat, in a final autonomous kit for potentiometric determination of pH. Qualitative calibration of the system revealed Nernstian behavior, resulting promising for novel point-of-care biomedical applications.


2019 ◽  
Vol 968 ◽  
pp. 61-67 ◽  
Author(s):  
Yuriy Tsapko ◽  
Olga P. Bondarenko ◽  
Aleksii Tsapko

Results of experimental researches about affectivity of firebiopotection products made from cane. Due to the unique properties of the cane, such as small volume weight, low thermal conductivity, rather high atmospheric resistance, high chemical resistance, the possibility of manufacturing parts at the site, efficiency, etc., cane products, despite the high pace of new technologies, are widely used in construction. Using cane in construction has a significant number of advantages, but needs protection from fire, from it produce a variety of products, equip the buildings. The unresolved issue of fire protection of products from such materials reduces the possibility of their use in construction. The experimental research on the determination of the fire-safety properties of the cane set the ignition of the raw sample, while for fire-proof - the process of ignition and propagation of the flame did not occur. Especially inhibition of the process of ignition and propagation of cane fire treated with a covering impregnation solution, which consist of fire retardants under the influence of temperature with the absorption of heat and the release of non-combustible gases (nitrogen, carbon dioxide), change in the direction of the expansion in the direction of formation of non-combustible gases and heavy-duty coke residue, reducing the combustion of the material and, accordingly, the index of flammability. This indicates the possibility of directed control of the processes of transfer of high temperature to organic material by using special covering compositions for cane products.


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