BS 2000-276:1995 Methods of test for petroleum and its products - Petroleum products - Determination of base number - Perchloric acid potentiometric titration method
2011BS ISO 3771:2011 Petroleum products. Determination of base number. Perchloric acid potentiometric titration method
1995BS 2000-276:1995 Methods of test for petroleum and its products - Petroleum products - Determination of base number - Perchloric acid potentiometric titration method