Причина отмены This test method covered and was intended for use in the field by nontechnical people for the quantitative measurement of lead in unleaded gasoline in the range from 0.01 g to 0.10 g Pb/U.S. gal (2.64 mg to 26.4 mg Pb/L). This method applied to all commercial gasolines and responded to all types of lead alkyls as well as to other organic and inorganic forms of lead.

Formerly under the jurisdiction of Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants, this test method was withdrawn in October 2022. Test Method D3348 was originally developed in 1974. Since the method development, the Mobil Lead test kit, which was used to establish the precision, is no longer commercially available. The fact that the test method equipment is no longer available makes the method’s precision invalid. Thus a new ILCP would need to be conducted on current commercial instrumentation to keep it valid. It is highly unlikely that an ILCP would get enough participants to develop new precision statements. In addition, since 1974 the use of lead in most motor gasoline has been phased out; therefore, the need for this method is minimal.

Значение и использование

4.1 This test is used to determine trace quantities of lead in unleaded gasoline. Unwarranted amounts of lead may cause deposits in automotive pollution control equipment and poisoning of catalytic mufflers.

Область применения

1.1 This test method covers and is intended for use in the field by nontechnical people for the quantitative measurement of lead in unleaded gasoline in the range from 0.01 g to 0.10 g Pb/U.S. gal (2.64 mg to 26.4 mg Pb/L). This method applies to all commercial gasolines and responds to all types of lead alkyls as well as to other organic and inorganic forms of lead.

Note 1: This test method is based on the use of the Mobil Lead Test Kit (Fig. 1).

Note 2: This test method is a screening test and is not to be used as a replacement for withdrawn Test Method D3116, withdrawn Test Method D3229, Test Method D3237, Test Method D3341, or Test Method D5059.

FIG. 1 Mobil Lead Test Kit

1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific warning statements, see Section 7.

1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.