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This is the original version (as it was originally made). Dim ond ar ei ffurf wreiddiol y mae’r eitem hon o ddeddfwriaeth ar gael ar hyn o bryd.
Y dull cyfeirio ar gyfer samplu a mesur PM10 fydd y dull a ddisgrifir yn EN 12341 “Air Quality – Field Test Procedure to Demonstrate Reference Equivalence of Samplung Methods for the PM10 fraction of particulate matter”(1). Mae'r egwyddor fesur wedi'i seilio ar gasglu'r gyfran PM10 o fater gronynnol amgylchynol ar hidlwr a darganfod y màs grafimetrig.
Cyhoeddiad y “CEN”, Sefydliad Safonau Ewrop, cyfeirnod BSEN 12341, sydd ar gael oddi wrth Sefydliad Safonau Prydain “BSI” fel ar gyfer troednodyn (a) uchod.
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