1.1 本试验方法包括同时测定氟化物（F − )，亚硝酸盐-N（NO 2. -N） ， 正交 -磷酸盐-P（o-PO 4. -P） ，溴（Br − )，硝酸盐-N（NO 3. -N） ，和硫酸盐（SO 4. -2 )高盐水中的离子（高达20 % 氯化钠（NaCl））通过抑制离子色谱和串联紫外线（UV）检测。 1.2 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。 1.2.1 例外情况- 压力测量所示的英寸-磅和国际单位应单独视为标准。 1.3 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、健康和环境实践，并确定监管限制的适用性。 1.4 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 离子色谱法可对常见阴离子F进行定性和定量测定 − ，否 2. − ，磷酸氢离子（HPO 4. –2 )，Br − ，否 3. – ，等等 4. –2 ，在毫克/升范围内，单个分析操作只需要几毫升样品进行分析。 5.2 阴离子组合，如氯化物/溴化物（Cl − /Br − )和亚硝酸盐/硝酸盐（NO 2. − /没有 3. – )离子色谱法可以很容易地将其他分析方法难以区分的杂质分离出来。

1.1 This test method covers the simultaneous determination of fluoride (F − ), nitrite-N (NO 2 -N), ortho -phosphate-P (o-PO 4 -P), bromide (Br − ), nitrate-N (NO 3 -N), and sulfate (SO 4 -2 ) ions in high saline water (up to 20 % sodium chloride (NaCl)) by suppressed ion chromatography and tandem ultra-violet (UV) detection. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.2.1 Exception— The inch-pound and SI units shown for pressure measurements are to be individually regarded as 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 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. ====== Significance And Use ====== 5.1 Ion chromatography provides for both qualitative and quantitative determination of common anions, F − , NO 2 − , hydrogen phosphate ion (HPO 4 –2 ), Br − , NO 3 – , and SO 4 –2 , in the milligram per litre range from a single analytical operation requiring only a few millilitres of sample for analysis. 5.2 Anion combinations such as chloride/bromide (Cl − /Br − ) and nitrite/nitrate (NO 2 − /NO 3 – ), which may be difficult to distinguish by other analytical methods, are readily separated by ion chromatography.