1. Reglamento de la Calidad del Agua para Consumo Humano DS N° 031-2010-SA DIGESA-MINSA Perú
2. ISO/IEC 17025:2005 General requirements for the competence of testing and calibration laboratories. International Organization for Standardization, Geneva
3. ISO Guide 33:2015 Reference materials—Good practice in using reference materials. International Organization for Standardization, Geneva
4. ISO Guide 34: 2009 General requirements for the competence of reference material producers. International Organization for Standardization, Geneva
5. ISO Guide 35: 2006 Reference materials—General and statistical principles for certification. International Organization for Standardization, Geneva