  IR spectra gained from laboratory investigations on analogue materials are an
important tool for the interpretation of astronomical IR data and the
understanding of the observed phenomena in DISM. Dust particles grown in
argon/acetylene low pressure plasma are proposed for a new analog. We test the
validity of proposed analog according to the criteria from the literature. We
also present preliminary results of nitrogen band at 4.62 \$mu$m, which has
been identified in dense cold dust.
