skip to main content

Quality Assurance for soil analysis


Prerequisite for precise and accurate results is a permanent quality assurance. Only analytical quality assurance turns your measured values into reliable analysis results. addista is the system with which you can check the precision and accuracy at any time. Regular checks safe guard the long-term reliabilty of your measuring system, of your handling and the materials you use (pipette, reagent, photometer, etc.).

Standard solutions
Standard solutions are used to the equipment (photometer, pipettes, cuvette tests, etc.) and the user’s working procedures.

Spiking solutions
Spiking solutions give assurance as whether the sample contains spurious ingredients that could falsify the result.

Ring test solutions
Ring test solutions of unknown concentration are analysed by the user and the result is sent in. Working procedures and materials are tested in the ring test. Participation is confirmed by means of an inter-laboratory test certificate.
A participation of the user in round-robin tests is often a prerequisite for the acceptance of equivalence of operational analysis methods.
Upon successful participation in the HACH round robin test, the student will receive a full test evaluation plus certificate.

Item-No.: LCA 700 – Potassium, Chloride
Item-No.: LCA 701 – Iron, Copper, Zink
Item-No.: LCA 703 – Phosphate, Ammonium, Chloride, Nitrate

Further addista on request.