standard samples, organic solvents, highly corrosive samples and scientific samples due to their extremely low blank value of metal elements and superior chemical properties.Because of the characteristics of no dissolution and precipitation, it is the cleanest laboratory analytical ...
Durable and Long-Lasting: The silicone rubber material provides excellent resistance to UV, dilute acids, ketones, and alkalis, ensuring the gasket remains effective and durable in harsh environments. Variety of Colors and Adhesives: Available in white, black, transparent, and custom colors, the gas...
In der Verfahrensstufe a) geht man von Polyaspartimiden, Poly¬ asparaginsäuren oder den Alkalimetallsalzen von Asparaginsäuren aus und hydrolysiert die Peptidbindungen im alkalischen pH-Be¬ reich. Pro Mol Aspartimid- und/oder Asparaginsäureeinheiten in den Polyaspartimiden bzw...
Bases and Alkalis 2SO4; Nitric, HNO3). However, not all compounds that contain Hydrogen are acids (Water, H2O; Methane, CH4). Acids are usually compounds of non metals with Hydrogen and sometimes Oxygen. O) ---> H+ HNO32+3- Sulphuric, Hydrochloric and Nitric acids are inorganic. There ...
Vorteilhaft wird der pH-Wert der erfindungsgemäßen Formulierungen im sauren bis sehr schwach alkalischen Bereich kleiner als 8 eingestellt, bevorzugt von 4,0 - 7,5 , besonders bevorzugt von 5,0 - 6,5. Die jeweils einzusetzenden Mengen an Hilfs- Zusatz- und Trägerstoffen und...
These salts are prepared in accordance with customary processes by sulphonation of diaryl ethers and subsequent neutralisation of the products with alkalis, such as the corresponding alkali metal hydroxide solutions or alkali metal carbonates, ammonia or the corresponding amines, preferably sodium hydroxide...