Evaluating Technique of Lubricants' Acute Ecotoxicity and Toxicity Rating Criteria

In reference to ASTM standards' water accommodated fraction(WAF)to prepare sample solution for toxicity test of lubricants,a set of evaluating approaches is established to inspect acute ecotoxicity of lubri- cants and additives in application of luminescent bacteria as testing organisms.Median effect load EL_(50) as de- termined indexes in aquatic ecotoxicity is introduced as well.It is revealed that the approaches have swift,con- venient,accurate,steady and economy features and they also help to make lubricant toxicity's judgment more scientific and accurate.An update experimental model is provided for biological inspection of varied oil pollu- tion and studies on aquatic ecological toxicity.The acute toxicity rating criteria of some insoluble matters pres- ented are simple and easy to carry out and they provide evaluating basis for lubricants' toxicity.Some typical lubricants and additives are evaluated and rated by means of the mentioned criteria to further prove the feasibili- ty of the evaluating technique of lubricants' acute ecotoxicity and toxicity rating criteria.