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Proficiency Testing (PT) scheme participation allows laboratories to:

  • objectively monitor and improve the quality of their measurement results in terms of accuracy and comparability,
  • independently demonstrate the continued competency of their analytical staff, and
  • demonstrate the effective maintenance of quality assurance systems.

Regular PT scheme participation is also a prerequisite to obtain and maintain ISO\IEC 17025:2017 accreditation for the competency of testing and calibration laboratories.

NMISA is committed to supporting laboratories through the provision of PT schemes that afford participating laboratories the opportunity to regularly demonstrate their analytical measurement competence. We are proud to offer the following PT scheme in 2020/21:

​Dispatch date ​PT Scheme No.​ PT Scheme Description ​Approx. Sample Size ​Registration fee
​Mycotoxins​ ​ ​ ​
​May 2020 ​NMISA-PT-63​Aflatoxins in peanut slurry ​100 - 200 g ​ R 2 400.00
​Aug 2020 ​NMISA-PT-50 ​Aflatoxin M1 in milk ​100 - 200 g ​ R 2 800.00
​Jan 2021 ​NMISA-PT-51​Mycotoxins in cassava ​100 -200 g ​ R 2 400.00
​Pesticides​ ​ ​ ​
​Jan 2020 ​NMISA-PT-ORG41 Round 4 ​Pesticides in macadamia nuts ​50 g + 50 g blank ​R 6 000.00
​April 2020 ​ NMISA-PT-53 Round 1 ​Pesticides in plums ​50 g + 50 g blank ​R 3 000.00
​June 2020 ​NMISA-PT-53 Round 2​Pesticides in sweet peppers ​50 g + 50 g blank ​R 3 000.00
​Sept 2020​NMISA-PT-54 ​Organic contaminants in drinking water ​ 2 x 1 L ​R 3 000.00
​Oct 2020​NMISA-PT-53 Round 3 ​Pesticides in litchie ​50 g + 50 g blank ​R 3 000.00
Jan 2021​NMISA-PT-53 Round 4 ​Pesticides in banana ​50 g + 50 g blank ​R 3 000.00
Feb 2021​NMISA-PT-53 Round 5 ​Pesticides in pears ​ 50 g + 50 g blank ​R 3 000.00
​Heavy Metals ​ ​ ​ ​
​Nov 2020​NMISA-PT-49 ​Toxic elements in cocoa powder ​50 g R 3 000.00
Nov 2020​NMISA-PT-55 ​Toxic elements in maize flour ​50 - 100 g R 3 000.00
Nutritional Content/ Food labelling ​ ​ ​ ​
Nov 2020​NMISA-PT-49 ​Nutritional elements in cocoa powder​50 g R 3 000.00
May 2020​NMISA-PT-52​Corn-soya fortified food matrix (Vitamins, elements, proximates)​200 - 400 gR 5 000.00
Oct 2020​NMISA-PT-57​Capsaicin in spices/chilli​50 gR 2 800.00
​Nov 2020​NMISA-PT-55​Nutritional Elements in maize flour​50 - 100 gR 3 000.00
Feb 2021 NMISA-PT-58
​Sugar content determination​100 - 200 g (mL)R 2 000.00
​Mar 2021​NMISA-PT-59​Free Fatty Acids in peanut oil​50 - 250 mLR 1 600.00
​Forensic Alcohol Analysis​ ​ ​ ​
June 2020 ​NMISA-PT-60 Round 1​Forensic Blood Alcohol testing: Ethanol​3 levels x 25 mL each​R 6 300.00
Aug 2020 ​NMISA-PT-60 Round 2​Forensic Blood Alcohol testing: Ethanol​3 levels x 25 mL each​R 6 300.00
Jan 2021​NMISA-PT-60 Round 3​Forensic Blood Alcohol testing: Ethanol​3 levels x 25 mL each​R 6 300.00
​Sept 2020​NMISA-PT-61​Forensic Blood preservation: Sodium fluoride​2 levels x 100 mL each​R 4 000.00
June 2020​NMISA-PT-62​Breathalyser calibration using waterbath method​1 level x 4 x 500 mL​R 7 000.00
​NMISA-PT​Beverage alcohol content (on request)


Register for these PTs by visiting our on-line store or sending us an e-mail at pt@nmisa.org


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NMISA is an ISO 17043:2010 accredited Proficiency Testing Scheme Provider (SANAS PTS0015). PT data is processed according to ISO 13528:2015 “Statistical methods for use in proficiency testing by interlaboratory comparison". Confidential PT reports may be used by participants to provide accreditation bodies or clients with objective evidence of laboratory performance.
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Consulting

The Organic Analysis Section consists of 12 scientists, with a collective core expertise in:

  • Chromatography (GC, GCxGC, HPLC, UPLC, GPC, SFC),

  • Mass spectrometry (MSD, TOF-MS, MS/MS),

  • Spectroscopy (FTIR, UV, 1H-NMR, QNMR),

  • Titrimetry (Potentiometric, Photometric, KF Volumetric and KF Coulometric),

  • Thermal Analytical techniques (DSC, TGA, Sorption Vapour Balance),

  • Elemental analysis (Total Nitrogen, Hydrogen, Carbon, Sulphur and Oxygen),

  • Advanced Sample preparation techniques (PLE, MAE, SPME, SPE, d-SPE and LLE),

  • Accurate quantification (d-IDMS),

  • Implementation and maintenance of quality systems

This section typically assists laboratories requiring assistance with on-site set up and validation of sample preparation and quantitative analytical methods, providing hands-on training and customised proficiency test materials for their unique applications. These are services needed by the laboratories to obtain ISO 17025 accreditation or expand on their existing scope.