Product introduction: 1:DSHD-0618 Asphalt Chemical Constituent Tester is designed and developed as per T0618 "Asphalt Chemical Constituent Test (Four Constituents Methods)" in the Industry Standard JTJ052 Specification and Test Methods of Bitumen and Bituminous Mixture for Highway Engineering. 2:DSHD-0618 Asphalt Chemical Constituent Tester is used to make four constituents analysis for petroleum asphalt using solvent precipitation method and chromatographic column method. 3:DSHD-0618 Asphalt Chemical Constituent Tester is mainly made of asphalt extractor (it includes ball condenser and extractor of 100 ml) and glass absorption column. Its structure and technical parameters are in accord with requirements of T0618-1993 Specifications: 1. condenser 2. absorption column 3. extraction apparatus 4. pyramid beaker(250ml)