NANOCONTROL NANOCHECK is a secondary standard for the control of inspection,
measuring and test equipment in accordance to ISO 9001 and ISO 14001. The test solutions have been
checked in a reference photometer monitored with primary standards (NIST-Standards). The results are
documented. With only 2 stable colour solutions the wavelength accuracy and the linearity of the
absorbance measurement can be checked.
NANOCONTROL NANOCHECK fullfils the requirements of analytical quality control mentioned
in the DWA-advisory leaflet A 704 (Operational Methods for the Self-Monitoring of Wastewater Systems).