An automatic flow system for NIR screening analysis of liquefied petroleum gas with respect to propane content

► Near-infrared screening analysis of liquefied petroleum gas with respect to propane content. ► Discrimination of poor (low propane content) and rich (high propane content) samples. ► Development of a gas flow system for sampling and measurement purposes. ► Selection of appropriate wavenumbers using the successive projections algorithm. ► Correct discrimination of all samples using only two wavenumbers.