ADDISTA is the name of the analytical quality assurance concept for the LANGE cuvette test system from HACH LANGE with multi-parameter standards. Advantages, overview of parameters; 2 pages

Rev. B

Quality assurance and analysis are completely interlinked. The care taken over the individual work steps and the quality assurance measures that are implemented, play a much greater role. The manufacturer actually carries out a substantial part of the quality assurance measures on behalf of users of LANGE cuvette tests. The relevant quality and batch certificates are available, e.g. on the Internet at www.hach-lange.com, as well as support provided for users carrying out individual quality control measures. The ADDISTA range of solutions provides support for the fundamental aspects of AQA. Author: Petra Pütz, Dipl.-Ing. Chemie, Application laboratory products HACH LANGE. 8 pages

Round robins are an important element of analytical quality assurance (AQA). For more than 20 years, HACH LANGE users have performed well in these tests with an excellent quality of the results. Recently it was demonstrated by the 2007 international round robin held by Kiwa, an independent Dutch organisation. More than 94 % of the LANGE cuvette test results were correct! (Measured parameters COD, NH4-N, NO3-N, TN, Ptot, TOC.) Author: Dipl.-Ing. Petra Puetz, HACH LANGE Lab product specialist. 4 pages.