GCC Standardization Organization (GSO) – Proficiency Testing
Regional standards body of the Gulf Cooperation Council, headquartered in Riyadh, that organises proficiency testing programmes for conformity assessment bodies in its member states, with recent programmes for paint, plastics, steel bars, cement, fuels, water and calibration laboratories.
Testing fields
- Water
- Petroleum, fuels & lubricants
- Materials & construction
- Calibration & metrology
Schemes (11)
Heavy Metals in Paint (Pb, Cd)
GSO-KTR PT/01/2024
- Materials & construction
- Sample type
- Paint
- Analytes
- Pb, Cd
Melt Flow Rate (MFR) of Plastics (LDPE)
GSO-KTR PT/02/2024
- Materials & construction
- Sample type
- Plastics (LDPE)
- Analytes
- Melt flow rate
Strength, Elongation and Extension for Hot Rolled Ribbed Steel Bars
- Materials & construction
- Sample type
- Hot rolled ribbed steel bars
Determination of C, Si, Mn, P, and S for Hot Rolled Ribbed Steel Bars
- Materials & construction
- Sample type
- Hot rolled ribbed steel bars
- Analytes
- C, Si, Mn, P, S
Fineness and Specific Surface Area of Cement
- Materials & construction
- Sample type
- Cement
Flashpoint and Sulfur content in Diesel Fuel
- Petroleum, fuels & lubricants
- Sample type
- Diesel fuel
- Analytes
- Flash point, sulfur
Petroleum Products & Lubricants
- Petroleum, fuels & lubricants
Potable Water Testing
- Water
Pressure Calibration
- Calibration & metrology
Temperature Calibration Laboratories
- Calibration & metrology
Mass Calibration
- Calibration & metrology
| Scheme | Testing fields | Sample type | Analytes | Rounds/yr | Link |
|---|---|---|---|---|---|
| Heavy Metals in Paint (Pb, Cd)GSO-KTR PT/01/2024 |
| Paint | Pb, Cd | — | Scheme page for Heavy Metals in Paint (Pb, Cd) (opens in a new tab) |
| Melt Flow Rate (MFR) of Plastics (LDPE)GSO-KTR PT/02/2024 |
| Plastics (LDPE) | Melt flow rate | — | Scheme page for Melt Flow Rate (MFR) of Plastics (LDPE) (opens in a new tab) |
| Strength, Elongation and Extension for Hot Rolled Ribbed Steel Bars |
| Hot rolled ribbed steel bars | — | — | Scheme page for Strength, Elongation and Extension for Hot Rolled Ribbed Steel Bars (opens in a new tab) |
| Determination of C, Si, Mn, P, and S for Hot Rolled Ribbed Steel Bars |
| Hot rolled ribbed steel bars | C, Si, Mn, P, S | — | Scheme page for Determination of C, Si, Mn, P, and S for Hot Rolled Ribbed Steel Bars (opens in a new tab) |
| Fineness and Specific Surface Area of Cement |
| Cement | — | — | Scheme page for Fineness and Specific Surface Area of Cement (opens in a new tab) |
| Flashpoint and Sulfur content in Diesel Fuel |
| Diesel fuel | Flash point, sulfur | — | Scheme page for Flashpoint and Sulfur content in Diesel Fuel (opens in a new tab) |
| Petroleum Products & Lubricants |
| — | — | — | Scheme page for Petroleum Products & Lubricants (opens in a new tab) |
| Potable Water Testing |
| — | — | — | Scheme page for Potable Water Testing (opens in a new tab) |
| Pressure Calibration |
| — | — | — | Scheme page for Pressure Calibration (opens in a new tab) |
| Temperature Calibration Laboratories |
| — | — | — | Scheme page for Temperature Calibration Laboratories (opens in a new tab) |
| Mass Calibration |
| — | — | — | Scheme page for Mass Calibration (opens in a new tab) |
Accreditation
This listing does not state an accreditation.
About this listing
Compiled from GCC Standardization Organization (GSO) – Proficiency Testing's own published information or sent in by the provider, and reviewed by EqasOnline. Check scheme details, fees and dates with the provider before you enrol. 11 schemes listed here.
Last updated 29 Oct 2026.
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