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.

Exploration and Production

The primary focus of Mitra PTS has always been the testing and analysis of coal samples.


Exploration and Production

Mitra PTS offers the following services for Explorers and Producers:

  • Borecore treatment program design for exploration samples
  • Pre-treatment and analysis of borecore samples
  • CHPP audit sampling and analysis
  • Routine plant feed analysis
  • Metallurgical and process sample evaluations
  • Preparation and dispatch of market samples

Preparation and Physical Testing

In the preparation and pre-treatment process, Mitra PTS can perform the following activities:

  • Crushing and Sample Division
  • Drop Shatter Test work
  • Wet Tumble Test
  • Milling or Grinding
  • Desliming
  • Size Analysis (Wet or Dry)
  • Bulk Density
  • Float - Sink Testing
  • Flotation Studies (Mechanical and Column Cell)
  • Boner Jig - Water Based Gravity Separation
  • Magnetics Content

Analytical Laboratory

The Laboratory can handle all the following tests in-house:

  • Total Moisture
  • Relative Density
  • Proximate Analysis
  • Crucible Swelling Number
  • Total Sulfur
  • Gross Calorific Value
  • Gieseler Plastometer
  • Dilatometer
  • Ash Fusibility
  • Ultimate Analysis (C, H, N)
  • Gray King Coke Type
  • Hardgrove Grindability Index
  • Light Transmittance (Humic Acid Test)


Other analyses available through Associated Laboratories are:

  • Petrographic Analysis
  • Carbonisation Tests
  • Trace Metal Analysis
  • Ash Analysis


Mitra PTS can provide full sampling and superintending services for cargo loading at Gladstone Ports as well as witnessing of cargo loading at other Australian Ports. Clients are assured of conformity to International Standards.

Our range of services that is offered to the coal industry includes:

  • Verification of quality in support of commercial transaction from mine to stockpile to vessel
  • Preparation and dispatch of market samples
  • Sampling, analysis and quality certification of export cargo
  • Witnessing of sampling, analysis and quality certification performed by others

Project Development

Mitra PTS has in-house capability to work with its customers to optimise sampling and analysis programs in order to provide customers with the key information they require to overcome operational challenges.


Quality Control

The most important aspect of our business is the production and reporting of Quality Data. This is done by the use of:

  • Trained and Competent Personnel
  • Rigid Procedures
  • Adherence to International Standards (AS, ISO, ASTM, BS) for Coal Testing
  • Participation in several proficiency Testing Programs
  • Compliance to ISO/IEC 17025
  • Cloud based inhouse customized ERP system for operational synchronization
  • Rockhampton Laboratory holds NATA Accreditation No. 16994
  • Gladstone Laboratory holds NATA Accreditation No. 14525

Click here to visit the NATA website

Send us a message

    Contact Us

    Mr. Stuart England
    General Manager
    Mitra PTS Pty Ltd
    13 Bush Crescent
    Parkhurst QLD 4702 Australia.
    PO Box 9833
    Frenchville QLD 4701 Australia
    Contact No: +61749362977
    Email: stuart@mitrask.com

    Ms. Kathy Surmon
    Laboratory Operation Manager
    Gladstone Laboratory
    9 Beckinsale Street
    QLD 4680
    Contact No: +61749724288
    Email: kathy@mitrask.com