Petrochemical | AdBlue®/DEF: Refractometric Analysis
AdBlue®, also known as DEF is an aqueous urea solution and lowers nitrogen oxides in diesel emissions. Measurement of refractive index in order to determine true urea concentration in AdBlue® is demanded by international standards.
Nitrogen oxides (NOx) are generated in engine cylinders from nitrogen and oxygen under high pressure and temperature. They consist mostly of nitric oxide (NO) and a smaller fraction of nitrogen dioxide (NO2). NOx play a role in smog formation and ozone depletion, making emissions a serious environmental concern.
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