Xinxin GuoManan AhmedShireley Wong2024-11-012024-11-012015-12-02http://www.tandfonline.com/doi/full/10.1080/03067319.2015.1114110https://dspace-cris.utar.edu.my/handle/123456789/5829Determination of surfactants and levoglucosan from selected vegetation by spectroscopic colorimetric methodjournal-article