ASTM D5954-1998(2006) Standard Test Method for Mercury Sampling and Measurement in Natural Gas by Atomic Absorption Spectroscopy《用原子吸收光谱法对天燃气中汞进行取样和测量的标准试验方法》.pdf
《ASTM D5954-1998(2006) Standard Test Method for Mercury Sampling and Measurement in Natural Gas by Atomic Absorption Spectroscopy《用原子吸收光谱法对天燃气中汞进行取样和测量的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM D5954-1998(2006) Standard Test Method for Mercury Sampling and Measurement in Natural Gas by Atomic Absorption Spectroscopy《用原子吸收光谱法对天燃气中汞进行取样和测量的标准试验方法》.pdf(5页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D 5954 98 (Reapproved 2006)Standard Test Method forMercury Sampling and Measurement in Natural Gas byAtomic Absorption Spectroscopy1This standard is issued under the fixed designation D 5954; the number immediately following the designation indicates the year oforiginal adoption or, in
2、the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test covers the determination of total mercury innatural gas at concentrations
3、 down to 1 ng/m3. It includesseparate procedures for both sampling and atomic absorptionspectrophotometric determination of mercury. The proceduredetects both inorganic and organic forms of mercury.1.2 The values stated in SI units are to be regarded as thestandard.1.3 This standard does not purport
4、 to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D 1193
5、 Specification for Reagent Water3. Summary of Test Method3.1 Mercury in a gas stream is adsorbed onto gold-coatedsilica beads and subsequently directly desorbed by heat into along path-length quartz cell connected to an atomic absorptionspectrophotometer. Mercury atoms are detected by measuringtheir
6、 absorbance of light from a mercury source lamp at acharacteristic wavelength. The mercury concentration is ob-tained from the absorbance peak area by comparison tostandards prepared at the time of analysis.4. Significance and Use4.1 This test method can be used to measure the level ofmercury in nat
7、ural gas streams for purposes such as determin-ing compliance with regulations, studying the effect of variousabatement procedures on mercury emissions, checking thevalidity of direct instrumental measurements, and verifyingthat mercury concentrations are below those required fornatural gas processi
8、ng and operation.4.2 Adsorption of the mercury on gold-coated beads canremove interferences associated with the direct measurementof mercury in natural gas. It preconcentrates the mercurybefore analysis thereby offering measurement of ultra-lowaverage concentrations in a natural gas stream over a lo
9、ng spanof time. It avoids the cumbersome use of liquid spargers withon-site sampling, and eliminates contamination problems as-sociated with the use of potassium permanganate solutions.3,4,55. Apparatus5.1 Atomic Absorption Spectrophotometer, equipped with a10-cm-long path quartz absorption cell and
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
下载文档到电脑,查找使用更方便
5000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ASTMD595419982006STANDARDTESTMETHODFORMERCURYSAMPLINGANDMEASUREMENTINNATURALGASBYATOMICABSORPTIONSPECTROSCOPY

链接地址:http://www.mydoc123.com/p-521117.html