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Tin ore concentrate proficiency test scheme

[Programa de ensayos de aptitud en mineral concentrado de estaño]

EPTIS factsheet 554031 | Last revision 2019-03-05 | URL: https://www.eptis.bam.de/pts554031 https://www.eptis.bam.de/pts554031

PT provider
PT provider Quality Assurance Partners (QAP) Quality Assurance Partners (QAP)
Based in Bolivia
Language(s) English, Spanish
Remarks The samples for this proficiency test scheme are prepared from ores of the Andean region in Bolivia. After a screening process (-#150 mesh) and mechanical homogenization, the material for each sample is divided in 100 grams portions and packaged in suitable containers. Homogeneity of the samples is confirmed by following ISO 13528 Annex B Guidelines. Each participant receives two (2) test items. Each tested property must be measured two (2) times. Is not mandatory to measure all properties. The testing methods included in this entry are only for orientation purposes.
Product groups Minerals
Testing fields Analytical chemistry
Technical details
Test item Tested property Testing method
Lead concentrates Arsenic (As) Atomic absorption spectrometry (AAS)
Iron (Fe) Atomic absorption spectrometry (AAS)
Sulphur (S) Gravimetric
Tin (Sn) Volumetry
Zinc (Zn) Atomic Absorption Spectroscopy
Aims of the PT scheme
Target group of participants Minerals analysis laboratories, no restrictions for participation.
Linked to specific legislation / standards
Additional, subsidiary aims characterisation of reference materials
Number of participants 12
Accredited or otherwise reviewed by a 3rd party
Operation is commissioned / requested by
Fees and frequency
Participation fee Upon request (shipping fees apply, QAP is not responsible for the payment of any import duties and taxes levied by the participant's county).
Regularly operated No (last time in 2015)
When will be the next round 2019
Contact details of the PT provider
Provider Contact person
Quality Assurance Partners (QAP)
6780 Hugo Ernest Ave.
La Paz

Phone: +591-2275 1959
Fax: +591-2275 1959
Web: http://www.quality-ap.com http://www.quality-ap.com
Mr. Nicolas Molina
Phone: +591-7016 6656
Fax: +591-2275 1959
Email: nmolina@quality-ap.com nmolina@quality-ap.com
If you find any mistakes please contact the responsible EPTIS coordinator in Bolivia, Ms Elizabeth Choque Mamani. Ms Elizabeth Choque Mamani.
Any questions or problems? Please contact us at eptis@bam.de.
Application version: 1.23-SNAPSHOT.20230502124635-7925ae379a631fc1ececff45d2921c8db38877d5