1.1 本试验方法 2. 包括在0.5至10.0μg Hg/L范围内测定水中的总汞 ( 1. ) . 3. 该试验方法适用于淡水、盐水和一些工业废水和污水。用户有责任确保本试验方法对未经试验基质的水的有效性。 1.1.1 分析员应认识到，该标准的精度和偏差可能会受到所有水域中其他成分的影响，如自来水、工业废水、河流和废水。本方法的冷蒸汽原子吸收测量部分适用于除水以外的材料（沉积物、生物材料、组织等）的分析，前提是且仅当执行了消解和氧化样品的初始程序，确保样品中的汞转化为汞离子，并溶解在水介质中 ( 2. , 3. ) . 1.2 如果有机和无机汞化合物首先转化为汞离子，则可通过该程序对其进行分析。 使用过硫酸钾和高锰酸钾作为氧化剂，消化温度为95°C，约为100℃ % 可以回收有机汞化合物 ( 2. , 4. ) . 1.3 测试方法的范围可能会因仪器或记录仪的扩展或两者兼而有之，以及使用更大体积的样品而改变。 1.4 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.5 还提出了一种处理含汞废物的方法( 附录X1 ) ( 5. ) . 1.6 警告- 许多监管机构已将汞指定为一种危险物质，可导致严重的医疗问题。汞或其蒸汽已被证明对健康有害，并对材料具有腐蚀性。处理汞和含汞产品时应小心。有关更多信息，请参阅适用的产品安全数据表（SDS）。用户应意识到，法律可能禁止向您所在的州或国家销售汞和/或含汞产品。 1.7 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。 有关具体的危险说明，请参阅 1.6 和 7.8 . 1.8 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 由于汞的毒性，公众对工业排放物、生活排放物和饮用水中汞的存在感到担忧。已经制定了要求监测水中汞的法规和标准。本试验方法提供了测量水中总汞的分析程序。

1.1 This test method 2 covers the determination of total mercury in water in the range from 0.5 to 10.0 μg Hg/L ( 1 ) . 3 The test method is applicable to fresh waters, saline waters, and some industrial and sewage effluents. It is the user's responsibility to ensure the validity of this test method for waters of untested matrices. 1.1.1 The analyst should recognize that the precision and bias of this standard may be affected by the other constituents in all waters, as tap, industrial, river, and wastewaters. The cold vapor atomic absorption measurement portion of this method is applicable to the analysis of materials other than water (sediments, biological materials, tissues, etc.) if, and only if, an initial procedure for digesting and oxidizing the sample is carried out, ensuring that the mercury in the sample is converted to the mercuric ion, and is dissolved in aqueous media ( 2 , 3 ) . 1.2 Both organic and inorganic mercury compounds may be analyzed by this procedure if they are first converted to mercuric ions. Using potassium persulfate and potassium permanganate as oxidants, and a digestion temperature of 95°C, approximately 100 % recovery of organomercury compounds can be obtained ( 2 , 4 ) . 1.3 The range of the test method may be changed by instrument or recorder expansion or both, and by using a larger volume of sample. 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.5 A method for the disposal of mercury-containing wastes is also presented ( Appendix X1 ) ( 5 ) . 1.6 Warning— Mercury has been designated by many regulatory agencies as a hazardous material that can cause serious medical issues. Mercury, or its vapor, has been demonstrated to be hazardous to health and corrosive to materials. Caution should be taken when handling mercury and mercury containing products. See the applicable product Safety Data Sheet (SDS) for additional information. Users should be aware that selling mercury and/or mercury containing products into your state or country may be prohibited by law. 1.7 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 hazard statements, see 1.6 and 7.8 . 1.8 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. ====== Significance And Use ====== 5.1 The presence of mercury in industrial discharge, domestic discharge, and potable water is of concern to the public because of its toxicity. Regulations and standards have been established that require the monitoring of mercury in water. This test method provides an analytical procedure to measure total mercury in water.