JJG 975-2002 化学需氧量(COD)测定仪

中华人民共和国国家计量检定规程

刀G975-2002

化学需氧量(COD)测定仪

ChemicalOxygenDemand(COD)Meters

2002一11一04发布2003一02一04实施

国家质量监督检验检疫总局发布

J.TG975-2002

化学需氧量(COD)测定仪

乌

.

r

J

J

.

检定规程J产

.

}JJG975-2002︺矛

.

价

J

.

乙

VerificationRegulationofChemical

OxygenDemand(COD)Meters

本规程经国家质量监督检验检疫总局于2002年11月04日批准，并自

2003年02月04日起施行。

归口单位:全国环境化学计量技术委员会

起草单位:国家标准物质研究中心

本规程委托全国环境化学计量技术委员会负责解释

JJG975-2002

本规程主要起草人:

史乃捷(国家标准物质研究中心)

李云巧(国家标准物质研究中心)

JJG975-2002

目录

1范围··························································································……(1)

2概述······························································，······················，···……(1)

3计量性能要求··········································································…·…(了夕

3.1A类仪器················································································…·…(1)

3.2B类仪器···········，·····································································……(2)

4通用技术要求··············································································……(2)

4.1外观·······················································································……(2)

4.2安全性能·················································································……(2)

5计量器具控制········。···································································…·…(2)

5.1检定条件···········，·····································································……(2)

5.2检定项目·················································································……(2)

5.3检定方法·····························································，··················……(3)

5.4检定结果的处理········································································……(5)

5.5检定周期·················································································……(5)

附录A检定记录格式(A类仪器)··················································……(6)

附录B检定记录格式(B类仪器)···················································……(8)

附录C检定证书内页格式(A类仪器)·············································……(9)

附录D检定证书内页格式(B类仪器)·············································……(10)

附录E检定结果通知书内页格式(A类仪器)····································……(11)

附录F检定结果通知书内页格式(B类仪器)····································……(12)

JJG975-2002

化学需氧量(COD)测定仪检定规程

范围

本规程适用于化学需氧量测定仪的首次检定、后续检定和使用中检验，在线化学需

氧量测定仪的校准可参照执行。

2概述

化学需氧量(又称COD)是水体中易被氧化剂氧化的物质所消耗氧化剂的数量，

是评价水体中有机物质相对含量的重要指标，它主要用于石油、化工、医药卫生等领域

的环境监测。化学需氧量测定仪按技术原理可大致分为两类，一类为分光光度原理:用

规定量重铬酸钾在一定条件下氧化水体，使