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CTS Agriculture Laboratory Proficiency (ALP) Program: Water

EPTIS factsheet 138199 | Last revision 2019-05-23 | URL: https://www.eptis.bam.de/pts138199 https://www.eptis.bam.de/pts138199

PT provider
PT provider Collaborative Testing Services Collaborative Testing Services
Based in United States
Language(s) English
Remarks Collaborative Testing Services (CTS) combines proven knowledge of interlaboratory testing with cutting edge tools to help you quickly and easily monitor your laboratory’s performance. We are committed to helping organizations achieve and maintain excellence in measurement quality. Contact us regarding your questions concerning testing materials and data analyses.
Product groups Agriculture
Testing fields Analytical chemistry
Technical details
Test item Tested property Testing method
Surface water Electrical conductivity -
Phosphorus, total ICP
Total organic carbon (TOC) -
Boron, Total -
Total Kjeldahl Nitrogen (TKN) -
Nitrogen (N) Combustion
pH -
Cation-Anion Difference -
Sum Cations, SAR, ADJ-SAR -
Cation Properties - Sodium, Calcium , Magnesium, Potassium, Ammonia - N -
Phosphate as P Spectrophotometry
Anion Properties - HCO3, CO3, Cl, NO3, SO4, Sum anions -
Aims of the PT scheme
Target group of participants
Linked to specific legislation / standards
Additional, subsidiary aims characterisation of reference materials
Number of participants
Accredited or otherwise reviewed by a 3rd party

Accredited by ANAB on the basis of ISO/IEC 17043:2010

Operation is commissioned / requested by
Fees and frequency
Participation fee Prices vary. Please visit www.collaborativetesting.com
Regularly operated Yes (3 times/year)
Year of first operation 2006
Contact details of the PT provider
Provider Contact person
Collaborative Testing Services
21331 Gentry Drive
20166 Sterling, VA
United States

Phone: +1-571-434-1925
Fax: +1-571-434-1937
Web: http://www.collaborativetesting.com http://www.collaborativetesting.com
Mr. Christopher Czyryca
Phone: +1-571-434-1925 x 103
Fax: +1-571-434-1937
Email: eptis@cts-interlab.com eptis@cts-interlab.com
If you find any mistakes please contact the responsible EPTIS coordinator in United States, Mr Johannes van de Kreeke. Mr Johannes van de Kreeke.
Any questions or problems? Please contact us at eptis@bam.de.
Application version: 1.23-SNAPSHOT.20230502124635-7925ae379a631fc1ececff45d2921c8db38877d5