天然水、地表水、饮用水、 废水污水中汞、总汞、水汞、液体汞检测方案(测汞仪)

MERCURY DETERMINATION IN NATURAL, SURFACE, SEA, DRINKING, BOTTLED, MINERAL, AND WASTE WATER BY CVAAS Lumex Method M 01-51-2012 ISO 12846-2012 INTRODUCTION Analysis of mercury content in natural and waste water is one of most popular analyses used for environment pollution control. Background concentrations of mercury in natural water are within several ng/l. MEASUREMENT METHOD The measurement method is based on digestion of mercury compounds in a water sample, recovery of mercury cations from decomposed sample with a tin chloride solution in the reaction vessel of «RP-92» attachment (“cold vapor” technique) and further determination of atomic mercury using the method of atomic absorption with the RА-915М analyzer (using one-path and multi-path cells). Depending on the chemical composition of a sample, one of the following two methods of digestion should be used. Method А (permanganate digestion) suggests hard digestion conditions and is recommended for preparation of samples with a complex matrix. This method is used to analyze natural, potable, and waste water. Method B (bromide-bromate digestion) suggests softer digestion conditions and is used to prepare samples of natural water (including seawater), mineral, potable water (including bottled and packaged water), and purified waste water. The method of LUMEX Instruments allows to determine both total mercury content and dissolved forms of mercury. Approximate time of sample preparation for analysis is 30 minutes for Method B and 2 hours for Method A. The time of mercury concentration measurement does not exceed 2 minutes. For express analysis of waste and technological water with a high mercury content (from 3000 ng/l) a scheme of analysis for direct mercury measurement (without sample preparation) was created, in which the PYRO-915+ pyrolytic attachment is used. MEASUREMENT RANGE The measurement ranges of the mass concentration of total or dissolved mercury are. 0.010–2000 µg/l (Method A); 0.010–50 µg/l (Method B). Maximum permissible levels for mercury are listed below. DIRECTIVE MPL, mg/kg (mg/l) WHO. Guidelines for drinking water quality. 4th ed. (2011) 0.006 (drinking water) FAO CODEX STAN 193-1995 0.001 (mineral water) US EPA. National Primary Drinking Water Regulations (40 CFR 141.62) 0.002 US FDA. Standards of Quality. Bottled water (21 CFR 103.35) 0.002 Drinking Water Directive 98/83/EC 0.001 ASEAN Marine Water Quality Criteria 0.00016 (marine water for aquatic life protection) GB 5749:2006 Standards for drinking water quality (China) 0.001 GB 3838:2002 Environmental quality standards for surface water (China) 0.0005 (surface water, quality class I) PROY-NOM-201-SSA1-2013 Productos y servicios. Agua y hielo para consumo humano, envasados y a granel. Especificaciones sanitarias (Mexico) 0.001 (drinking water) PORTARIA № 2914/2011, Dispõe sobre os procedimentos de controle e de vigilância da qualidade da água para consumo humano e seu padrão de potabilidade (Brazil) 0.001 (drinking water) DIRECTIVE MPL, mg/kg (mg/l) GSO 149/2014 Unbottled drinking water 0.006 GSO 987/2012 Bottled natural mineral water 0.001 GSO 1025/2012 Bottled drinking water 0.006 IS 10500:2012 Drinking Water – Specification (India) 0.001 Guidelines for Canadian Drinking Water Quality 0.001 Japan Drinking Water Quality Standards 0.0005 ISIRI 1053:2009 Drinking water – Physical and chemical specifications (Iran) 0.006 ISIRI 2441 Natural mineral water – Specifications and test methods (Iran) 0.001 ISIRI 12958 Food & feed – Maximum limit of heavy metals (Iran) 0.006 (bottled water) Pakistan National Standards for Drinking Water Quality (NSDWQ) 0.001 SanPiN 2.1.4.1116-02 Drinking water. Hygienic requirements to packed water quality. Quality control (Russia) 0.0005 Australian Drinking Water Guidelines 0.001 Código Alimentario Argentino. Capitulo XII (Argentina) 0.001 (drinking water) EQUIPMENT AND REAGENTS The following equipment and materials are used for analysis: Mercury analyzer RА-915М with RP-92 attachment; PC with Windows® ХР/Vista/7/8 and RAPID software; СRM of mercury. EXAMPLES OF ANALYSIS The accuracy of the method was proved by the results of inter-laboratory proficiency testing programs, provided by the independent testing laboratories. Year Water sample identification Measured value, µg/l Certificate value, µg/l 2010 OK 13-10 1.90.5 2.040.04 2013 OK C3-13 5.220.70 5.60.1 2014 OK L4-14 0.5070.101 0.500.03 “Lumex Instruments” specialists took part in the validation of the method “ISO 12846-2012 Water quality – Determination of mercury – Method using atomic absorption spectrometry (AAS) with and without enrichment”. The information in this leaflet is supplemental. To get more specific information on this method, please contact the developer of this method LUMEX INSTRUMENT Group. NORTH AMERICA Lumex Instruments Canada 0890278 B.C. Ltd. E-mail: info@lumexinstruments.com www.lumexinstruments.com EUROPE Lumex Analytics GmbH E-mail: info@lumexanalytics.de www.lumexanalytics.de RUSSIA Lumex-Marketing LLC E-mail: sales@lumex.ru www.lumexinstruments.com CHINA Beijing Lumex Analytical Equipment Co. Ltd. E-mail: lumex@lumex.com.cn www.lumexcn.com ( 2 ) 地表水、饮用水、海水、废水中汞的含量分析是环境污染控制中最常用的分析方法之一。天然水中汞的背景浓度在几纳克每升以下。该测定方法是以水样中汞化合物的消解为基础，用RP-92附件（冷蒸气法）的反应容器中的氯化亚锡溶液从分解的样品中回收汞离子，并使用该方法进一步测定原子汞。        为了分析含汞量高（3000 ng/L）的废水和工业用水，建立了一种使用PYRO-915+热解附件来直接测定汞（无需样品制备）的分析方案。