Mitra SK Australia was established in 2013 with a focus on Coal and Iron Ore analysis and superintending services. An office was established in Melbourne to support the superintending services of bulk cargoes of coal and iron ore which were being shipped to China and India.

With the rapidly expanding coal industry in Queensland, in June 2014 Mitra SK acquired Preplab Testing Services Pty Ltd – a NATA accredited coal laboratory group having physical testing and laboratory services already established in Rockhampton and Gladstone in Central Queensland.

Preplab Testing Services Pty Ltd brought to Mitra SK 25 years of experience in the Queensland coal industry, in the fields of bore core preparation and quality analysis as well as Coal Preparation Plant quality control and production quality monitoring.

Preplab Testing Services Pty Ltd became a wholly owned subsidiary of the Mitra SK Group and in January 2019, Preplab Testing Services Pty Ltd became Mitra PTS Pty Ltd – a Coal testing laboratory group with plans to expand into the Australian Base Metal, Bauxite and Gold industries.

Quality Services in a timely fashion:

In an industry where 1/2 a percent can mean millions, get your results back when you need them! Preplab’s 30 years of experience and reputation is now Mitra PTS’s credential as a high-quality provider of services to Australian mining industry clients and pay attention to their clients’ deadlines.

On-Site Laboratory Service:

Upon request Mitra PTS can supply expert coal technicians and equipment to your site, all our coal technicians are capable of operating laboratories. These services are currently available in Central Queensland and surrounding areas, and those located in the Bowen Basin.


Mitra PTS offers a variety of indispensable superintending services when hired by clients. To maintain their ability to be constantly convenient and available. Mitra PTS witness iron ore and offer 3rd party analysis. They provide this service to facilities in Central Queensland and surrounding areas, and those located in the Bowen Basin.


The Mitra PTS laboratory group are NATA accredited coal laboratories, operating state of the art facilities in Rockhampton (NATA Accreditation No 16994) and Gladstone (NATA Accreditation No 14525), with the capability of performing the following analyses:

Physical Testing Laboratory:

  • Crushing, sample division (RSD) and milling,
  • Sample preparation (drop shatter, wet & dry drum tumble),
  • Apparent relative density,
  • Size analysis (wet and dry sizing capability),
  • Washability analysis,
  • Froth flotation analysis,
  • Bulk density determination,
  • Hardgrove grindability index.

Chemical Laboratory:

  • Total moisture determination,
  • Proximate analysis
  • Total sulfur determination (IR method),
  • Ultimate analysis,
  • Gross calorific value analysis,
  • Crucible swell number
  • Geiseler plastometer determination
  • Dialotometer determination
  • Gray king coke test
  • Ash fusion temperatures
  • Relative density determination

For further details on Mitra PTS, please download.

Head Office:

Mitra PTS Pty Ltd
13 Bush Crescent
Parkhurst QLD 4702 Australia.
PO Box 9833
Frenchville QLD 4701 Australia.

Bijay Pattnaik
Chief Operating Officer
Contact No: +61 438530349

Stuart England
General Manager
Contact No: +61749362977