These test methods cover the determination of total nitrogen in samples of coal and coke. The analytical data from these test methods shall be reported as part of ultimate analysis where ultimate analysis is requested. If ultimate analysis is not requested, the value shall be reported according to the request. Formerly under the jurisdiction of Committee D05 on Coal and Coke, these test methods were withdrawn in October 2008. These test methods are being withdrawn with no replacement because these test methods mention the use of mercury.

Nitrogen results obtained by these test methods are required to fulfill the requirements of the ultimate analysis, Practice D 3176. Also, results obtained may be used to evaluate the potential formation of nitrogen oxides as a source of atmospheric pollution.

Nitrogen data are used in comparing coals and in research. When the oxygen content of coal is estimated by difference, it is necessary to make a nitrogen determination.

1.1 These test methods cover the determination of total nitrogen in samples of coal and coke. The analytical data from these test methods shall be reported as part of ultimate analysis where ultimate analysis is requested. If ultimate analysis is not requested, the value shall be reported according to the request. Two methods are included as follows:

1.2 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.

1.3 The values stated in SI units are to be regarded as the standard.