English: loss on ignition
Welsh: colled wrth danio
Subject: Cyllid ac ystadegau
Welsh definition: Loss on ignition is a test used in inorganic analytical chemistry, particularly in the analysis of minerals. It consists of strongly heating ("igniting") a sample of the material at a specified temperature, allowing volatile substances to escape, until its mass ceases to change.
Welsh context: Yn olaf, yn ystod y gwaith paratoi cynnar mewn perthynas â rheoliadau yn adran 17 (cymysgedd cymwys o ddeunyddiau: gronynnau mân), mae wedi dod i'r amlwg bod angen cyflwyno gwelliannau i sicrhau y gellir rhoi ar waith system 'colled wrth danio' gadarn.