Meaning
Specialized chemical formulations prevent interfering side reactions when determining the water content of carbonyl compounds in polymer additives and solvents. The use of ketone resistant reagents replaces standard methanol-based systems to eliminate the formation of water via acetalization during Karl Fischer titration. This substitution enables precise moisture analysis of plasticizers and resin mixtures containing reactive functional groups, which otherwise yield false high moisture readings that disrupt material acceptance testing.
Chemical Interference
Standard reagents react with ketones and aldehydes to form acetals and water, which continuously generates water during the titration. This ongoing reaction prevents the instrument from reaching a stable endpoint, making accurate moisture measurements impossible. Non-reactive alcohol alternatives in the reagent mixture prevent this reaction from occurring.
Testing Applications
Molding facilities utilize these specialized reagents to evaluate incoming liquid additives and masterbatch carriers. Ensuring the accuracy of these feedstock tests prevents processing issues like hydrolytic degradation during subsequent extrusion steps. Reliable testing safeguards the mechanical properties of molded parts.
Reagent Longevity
These non-reactive reagents maintain their stability over extended storage periods under proper laboratory conditions. Protecting the chemicals from light and temperature extremes extends their useful life. This reduces reagent disposal costs and ensures reproducible results across multiple production campaigns.
