Bithiah K. Y. Liu

Laboratory Manager

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ETL’s Chemical division provides a full range of chemical analyses for environmental, metal, petroleum products in soil, cement, concrete and its related materials.  With over 20 years experience, we provide testing services for water supply pipes & fitting and solder materials, according to the WSD requirements, and is one of the few HOKLAS accredited laboratories in Hong Kong for chemical analysis of copper alloy and solder alloy.


Providing fast and accurate chemical composition analysis for steel and copper alloy (HOKLAS method (spark-OES)), our Chemical division attained accreditation from the WSD Approval Laboratory for Heavy Metal Water Testing in December 2015.


For further information or to receive a quote, please contact the Chemical team

Water Fittings
  • Chemical Composition of Copper Pipe & Fitting

  • Chemical Composition of Soldering Material

Metal & Alloy Analysis
  • Chemical Composition of Metal & Alloy, e.g.  Stainless Steel, Steel, Copper Alloy, Aluminium Alloy etc.
Diesel Oil
  • Sulphur Content of Diesel Oil
Construction Materials
  • Chemical Composition of Cement

  • Chemical Composition of Concrete

  • Chemical Composition of Soil

  • Chemical Composition of Mortar

Job Reference

Sulphur Content of Diesel Oil

Date: August 2011 to present

Division: Chemical

Project: Central - Wan Chai Bypass - Tunnel (North Point Section) and Island Eastern Corridor Link

Client: Chun Wo - CRGL - MBEC Joint Venture

Chemical Composition Analysis of Copper Alloy Gate Valve

Date: August 2009 to present

Division: Chemical

Project: Contract No. 7/WSD/08 - Replacement and Rehabilitation of Water Mains Stage 3, Mains in East Kowloon

Client: Ming Hing Waterworks Engineering Co Ltd

Chemical Test for Soil

Date: December 2015 to April 2016

Division: Chemical

Project: Contract No. HY/2012/08 Tuen Mun - Chek Lap Kok Link - Northern Connection Sub-sea Tunnel Section

Client: Civil Engineering and Development Department (CEDD)

Chemical Analysis of Steel Bar

Date: June 2015 to December 2019

Division: Chemical

Project: MTRC Shatin Central Link

Client: Dragages - Bouygues Joint Venture