Directorate of Measures and Precious Metals will organize Proficiency Testing schemes (PT schemes) in the field of optical radiation (for calibration of spectrophotometers and calibration of reflectometers), and in the field of volume of liquid (for calibration of laboratory glassware). Laboratories interested in participation to these PT schemes can register until April 15, 2013. For further information on registration to these PT shemes, address the following e-mails: This email address is being protected from spambots. You need JavaScript enabled to view it. and This email address is being protected from spambots. You need JavaScript enabled to view it. for the field of optical radiation, and This email address is being protected from spambots. You need JavaScript enabled to view it. and This email address is being protected from spambots. You need JavaScript enabled to view it. for the field of volume of liquid.