Within the framework of the external quality assurance according to DIN EN ISO/IEC 17025 we examine the result and the competence of accredited and non-accredited measurement methods through regular proficiency tests and laboratory comparison measurements.

We have passed the following external aptitude test in the past 3 years without any errors (z-score < 2) above the determination limit:

2019:

• • Partikel Master: ultrasonic cleaning, determination of size and particle number
• • Partikel Master: spray cleaning, determination of size and particle number
• • IFA CB06: LHKW in water
• • CEC: comparative test for particulate measurement systems

2020:

• • nano Analytics: laboratory comparison of metall alloy by EDX (Ge, Ni, Y)
• • r-concept: water for electrical conductivity, pH-value, Na, K, Mg, Ca, chromium (VI), chloride and sulphate
• • Kunststoffinstitut Lüdenscheid: identification of plastic granules by FTIR
• • BIDAG: ultrasonic cleaning, determination of size and particle number
• • BIDAG: spray cleaning, determination of size and particle number
• • IFA Wien: LHKW’s in water

2021:

• • r-concept: water for electrical conductivity, pH-value, Na, K, Mg, Ca, chromium (VI), chloride and sulphate
• • r-concept: water (As, Pb, Cd, Cr, Fe, Cu, Mn, Ni and Zn)
• • BIDAG: particle (gravimetry)
• • NLGA: water (pH-value)

2022:

• • IFA Wien: LHKW’s in water
• • nano Analytics: laboratory comparison of metall alloy by EDX (Fe, Cr, Ni)
• • r-concept: water (As, Pb, Cd, Cr, Fe, Cu, Mn, Ni, Hg and Zn)
• • Kunststoffinstitut Lüdenscheid: identification of plastic granules by FTIR
• • CEC: comparative test for particulate measurement systems
• • BIDAG: ultrasonic cleaning, determination of size and particle number
• • BIDAG: spray cleaning, determination of size and particle number

2023:

• • r-concept: water for electrical conductivity, pH-value, Na, K, Mg, Ca, chromium (VI), chloride and sulphate
• • IFA Wien: LHKW’s in water
• • Kunststoffinstitut Lüdenscheid: PVC (Phthalates)
• • BIDAG: particle (gravimetry)