Sustainable Partnership....  شراكة مستدامة
Republic of Yemen State of Kuwait State of Qatar Sultanate of Oman Kingdom of Saudi Arabia Kingdom of Bahrain United Arab Emirates

Proficiency Testing Activities

Next PT Rounds:

Diesel Oil (March 2014)
The Next GSO PT round will be on Diesel Oil testing, this PT is organised in cooperation with the internationally accredited PT provider  Quatest3 .
The parameters covered will be as follows:Sulfur content                           
  • Sulfur content                           
  • Cetane index                         
  • Distillation                               
  • Flash point closed cup          
  • Kinematic viscosity @ 40 o
  • Pour point      
  • Density @ 15 oC   

ASTM Internationl

November 2014

ASTM Concrete Proficiency Testing Program

Concrete Proficiency Sample Program provides for the distribution of a pair of samples twice a year. For each individual sample portland cement, coarse aggregate, and fine aggregate are packaged separately. The quantity of material needed for this sample makes it necessary to send the sample pair in four cartons, each weighing approximately 30 kilograms. The material furnished in each sample is sufficient to perform tests for slump, air content, unit weight, and to make two 6 by 12 inch (150 by 300 mm), or three 4 by 8 inch (100 by 200 mm) test cylinders. Samples are shipped to participants in April and November.


The ASTM standards on which prescribed tests are based are as follows:

1. Compressive Strength of Cylindrical Concrete Specimens, C39

2. Unit Weight of Concrete, C138

3. Slump of Portland Cement Concrete, C143

4. Air Content of Freshly Mixed Concrete by the Volumetric Method, C173

5. Air Content of Freshly Mixed Concrete by the Pressure Method, C231

6. Making and Curing Concrete Test Specimens in the Laboratory, C192   

ILAC Proficiency Testing Consultative Group (PTCG)

These are the documents the ILAC at Proficiency Testing Consultative Group (PTCG) has published

A Discussion of Proficiency Testing Benefits and Program Strategies
543 KB | This discussion paper was tabled at the ILAC Proficiency Testing Consultative Group (PTCG) Meeting held in Cancun in October 2006. It was written by one of the active contributors to the PTCG, Mr Ken Middlebrook. The document is considered to be a useful information document for ILAC Members, PT providers and laboratories participating in PT programs. It has therefore been recommended for inclusion in the ILAC Library.
A Discussion of Homogeneity Issues in Proficiency Testing for Calibration Laboratories
183 KB | This paper was prepared for consideration in the ILAC Proficiency Testing Consultative Group (PTCG). It was prepared by an active contributor to the Group, Mr Jeff Gust, and was accepted by the PTCG as a useful information document for dissemination by ILAC to its members and to interested proficiency testing providers. Its purpose was to explore in more detail the topic of homogeneity issues for proficiency testing of calibration laboratories and followed the earlier preparation of the more general ILAC Discussion Paper on Homogeneity and Stability. The document has therefore been recommended to be included in the ILAC Library.
ILAC Discussion Paper on Homogeneity and Stability Testing
80 KB | This paper was prepared by a small task group within the ILAC Proficiency Testing. Consultative Group (PTCG) led by Mr Dan Tholen. The content of the paper was reviewed by the PTCG at its meeting in Cancun in 2006. The paper is an information document, initially intended to provide some inputs to the revisions of ILAC G13 and the new ISO/IEC 17043 Standard. While the text of this discussion paper has not been directly incorporated into G13 and ISO/IEC 17043, it is considered to be useful background on issues related to the often difficult problems of achieving homogeneity and stability of proficiency testing items. It has therefore been recommended for inclusion in the “ILAC Library”.
Educational Aspects of Proficiency Testing Programs
210 KB | This paper was prepared by Ms Ingrid Flemming and Mr Dan Wruk within the ILAC Proficiency Testing Consultative Group (PTCG) - whose attendees provided commentary on earlier drafts. Its preparation followed detailed discussion within the PTCG on the need to highlight the valuable educational value (for participating laboratories) of PT programs. The document was subsequently published in the October 2007 issue of Chemistry in Australia ,the journal of the Royal Australian Chemical Institute.