HJ 442.3-2020 English PDFUS$819.00 · In stock
Delivery: <= 6 days. True-PDF full-copy in English will be manually translated and delivered via email. HJ 442.3-2020: (Technical specifications for environmental monitoring of coastal waters - Part 3: Water quality monitoring of coastal waters) Status: Valid
Basic dataStandard ID: HJ 442.3-2020 (HJ442.3-2020)Description (Translated English): (Technical specifications for environmental monitoring of coastal waters - Part 3: Water quality monitoring of coastal waters) Sector / Industry: Environmental Protection Industry Standard Classification of Chinese Standard: Z06 Classification of International Standard: 13.020 Word Count Estimation: 40,488 Date of Issue: 2020-12-16 Date of Implementation: 2021-03-01 Older Standard (superseded by this standard): HJ 442-2008 Regulation (derived from): Ministry of Ecology and Environment Announcement No. 66 [2020] Issuing agency(ies): Ministry of Ecology and Environment HJ 442.3-2020: (Technical specifications for environmental monitoring of coastal waters - Part 3: Water quality monitoring of coastal waters)---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order. (Technical specifications for environmental monitoring of coastal waters Part 3 Water quality monitoring of coastal waters) National Environmental Protection Standards of the People's Republic of China Replace HJ 442-2008 Technical specifications for environmental monitoring in coastal waters Part III Water Quality Monitoring of Inshore Waters Technical specification for offshore environmental monitoring Part 3 offshore seawater quality monitoring 2020-12-16 release 2021-03-01 implementation Issued by the Ministry of Ecology and Environment i table of contents Foreword...II 1 Scope of application...1 2 Normative references...1 3 General requirements for water quality monitoring in coastal waters...1 4 Collection, storage and transportation of water quality samples...2 5 Water quality sample analysis...10 6 Quality control of water quality monitoring...10 Appendix A (informative appendix) Observation methods for hydrometeorological projects...14 Appendix B (informative appendix) Water quality monitoring project analysis method...15 Appendix C (Normative Appendix) Determination of Ammonia in Seawater in Estuary and Inshore Waters by Continuous Flow Colorimetry...22 Appendix D (Normative Appendix) Determination of Nitrate Nitrogen and Nitrite in Sea Water of Estuary and Coastal Sea by Continuous Flow Colorimetry Nitrogen...26 Appendix E (Normative Appendix) Determination of Active Phosphate in Sea Water of Estuary and Inshore by Continuous Flow Colorimetry...30 Appendix F (Normative Appendix) Determination of active silicate in seawater of estuaries and coastal waters by continuous flow colorimetry...33 Appendix G (Normative Appendix) Determination of Selenium in Sea Water by Atomic Fluorescence Method...36 1 Technical specifications for environmental monitoring in coastal watersPart III Water Quality Monitoring of Inshore Waters1 Scope of applicationThis standard specifies the collection, storage, transportation, on-site testing, laboratory analysis and quality of water quality monitoring samples in coastal waters. Basic methods and procedures of control. This standard is applicable to the monitoring of water quality in coastal waters, estuaries and salty and brackish waters (excluding sections of rivers entering the sea Monitoring of pollutants entering the sea). Including container preparation and washing, sample collection, pre-processing, field testing, laboratory analysis and QC.2 Normative referencesThe content of this standard refers to the terms in the following documents. For undated references, the effective version is applicable to this standard. GB 3097 sea water quality standard GB 12763.4 Marine Survey Specification Part 4.Investigation of Seawater Chemical Elements HJ 168 Technical Guidelines for the Preparation and Revision of Environmental Monitoring and Analysis Methods HJ 442.1 The general rules of the first part of the technical specifications for environmental monitoring in coastal waters HJ 442.2 Technical Specification for Environmental Monitoring in Coastal Seas Part 2 Data Processing and Information Management HJ 442.6 Technical Specification for Environmental Monitoring in Coastal Seas Part 6 Biological Monitoring in Coastal Seas HJ 442.10 Technical Specifications for Environmental Monitoring in Coastal Seas Part Ten Evaluation and Report HJ 730 Technical Specification for Layout of Environmental Monitoring Points in Coastal Waters3 General requirements for water quality monitoring in coastal watersThe implementation plan for coastal water quality monitoring shall be determined in accordance with the relevant requirements of HJ 442.1; the layout of monitoring points shall be determined in accordance with HJ 730 Implementation of relevant requirements; data processing, statistics, summary, review and submission shall be implemented in accordance with HJ 442.2 requirements; water quality evaluation and reporting Compilation is carried out in accordance with the requirements of HJ 442.10. The frequency of routine water quality monitoring is generally 3 times a year, and the sampling time is arranged in March to May, July to August and September to November. In principle, the interval between two monitorings should be more than 2 months. The mandatory measurement items for coastal water quality monitoring are determined in accordance with GB 3097 and based on the monitoring purpose. The water depth and salt Degree, chlorophyll a, actual sampling latitude and longitude, etc.; optional measurement items include redox potential, silicate, hydrological and meteorological parameters For the related analysis and quality control of chlorophyll a, please refer to the relevant requirements of HJ 442.6; The plan is selected according to the monitoring purpose. Other monitoring water quality monitoring items, time, frequency, etc. shall be determined according to the monitoring purpose. 24 Water quality sample collection, storage and transportation 4.1 Preparation of containers and sampling equipment 4.1.1 Selection of container The choice of containers for sampling and sample storage determines whether the sample undergoes physical, chemical, and biological reactions before analysis, which affects The accuracy of the analysis. The following factors should be considered when choosing a container. a) The material of the container has strong chemical stability, does not react with the tested component, and the wall should not absorb or adsorb the tested component It is easy to clean, has a certain degree of shock resistance, can adapt to large temperature changes, and has a tight seal; b) Generally, sample containers made of materials with strong stability such as hard glass and polyethylene plastic are selected, most of which contain inorganic The samples of the components are mostly containers made of polyethylene, polytetrafluoroethylene and polycarbonate polymers; High density polyethylene, suitable for silicate, sodium salt, total alkalinity, chloride, conductivity, pH analysis in water And storage of samples for determination; light-absorbing glass materials are often used for photosensitive substances, such as brown bottles, and tin if necessary Foil shading; commonly used glass containers are suitable for the storage of organic compounds and biological samples; plastic containers are suitable For the storage of radionuclides, most trace elements and water samples for routine monitoring items; with neoprene rubber ring and oil The container of the mass lubrication valve is not suitable for the storage of organic matter and microorganism samples; c) Generally, narrow-mouth containers are used for water samples, and the sealing material of the container is the same as that of the container, and the sealing corks should not be mixed; In special circumstances, when wooden or rubber stoppers are needed, they must be wrapped in stable metal foil; organic matter and bacteria Do not use rubber stoppers for product containers; do not use glass stoppers for alkaline liquid sample containers; do not use paper balls and metal materials Material plug. 4.1.2 Washing of containers New containers must be degreased and thoroughly cleaned of substances that may cause pollution effects before they can be used. General container cleaning The type of detergent used should be selected according to the composition of the substance to be tested. Routinely monitored container washing methods are shown in Table 1. a) Cleaning of newly purchased containers. When cleaning with general detergent or non-phosphorus detergent, first use a soft brush to scrub the container Rinse the outer surface and cover with tap water, and then rinse with pure water that meets the analysis requirements of the monitoring project 3 Times b) Cleaning of stoppered glass bottles. pay attention to the dissolution, adsorption and adhesion phenomena that may exist in the ground part. Containers that cannot be cleaned cannot be used for sampling; c) Polyethylene bottle cleaning. pay special attention to the absorption of oil, heavy metals, sediments and organic matter, and it is really impossible to scrub clean The container cannot be used for sampling; d) Cleaning of glass bottles storing petroleum and organic water samples. clean with tap water, chromic acid lotion, tap water and pure water After drying, rinse with purified or qualified extraction solution for 3 times, dry in the shade and pack it in the packing box to avoid contamination; e) Washing of chlorophyll a and toxic algae sample bottles. wash with tap water and distilled water in turn; f) Containers for storing and testing bacterial water samples. After cleaning according to general methods, place the containers in a pressure cooker at 120°C And keep it for 15 minutes, or bake in a 160℃ oven for 2 hours to sterilize; g) Washing of active phosphate and total phosphorus sample bottles. After washing with a non-phosphorus detergent, they must be washed with (13) hydrochloric acid After soaking for 24 hours and washing with pure water, cover the mouth of the bottle with aluminum foil and save it for later use; h) Storage of water sample bottles for counting and biochemical analysis. soak in nitric acid solution for a long time, then rinse with distilled water to remove 5e) Reasonable price, easy to promote and use. 4.1.4.2 Sampler The sampler is selected according to the actual sampling situation. The sampler generally includes the following types. a) Instantaneous sample sampler, including. 1) Nearshore surface water collector. a plastic-wrapped bottle clamp is connected to a telescopic long rod, and the sampling bottle is fixed on the plastic On the bottle clamp, the sampling bottle is the sample bottle; 2) Throwing floating water collector. the sampling bottle is installed in a fixed frame made of stainless steel that can be opened, and the steel frame is fixed A long nylon rope is connected with a floating ball and is usually used to collect water samples such as surface petroleum hydrocarbons; 3) Depth comprehensive method sampler. The depth comprehensive method sampling requires a set to clamp the sampling bottle and sink it into the water The mechanical device of the weighted object sinks into the water, and at the same time, the entire vertical section of the Each layer of water samples enter the sampling bottle; 4) When using the instantaneous sampler, in order to make the water sample proportionally taken at various depths, the sampling bottle should settle or be The speed of ascent should be changed correspondingly with different depths. At the same time, it should also have an adjustable injection hole to maintain the When the water pressure changes, the injection flow rate is constant; when there is no above-mentioned sampling equipment, the open-close type can be used The water collector separately collects samples from each depth layer and then mixes them. b) Open-closed water collector. It is a simple and easy to use sampler, open at both ends, the top and bottom can be opened respectively The lid of the water collector is opened and sinks into the water. When the sampling depth is reached, the lids at both ends are closed according to the instructions. That is, samples of the required depth can be taken. c) Selected depth fixed-point water harvester (closed-open-closed water harvester). the sampling bottle fixed on the sampling device is closed Dive into the water. When the sampler reaches the selected depth, open it according to the instruction. After the sampling bottle is filled with water sample, follow the instruction Closed; the closed-open-closed water collector made of non-metallic materials is very suitable for the collection of trace metal samples. d) Pump suction system water collector. With the pump suction system water collector, a large volume of water sample can be obtained, and the vertical And horizontally study the "fine structure" of the water body for continuous sampling, and can be used with the temperature and salt depth instrument (CTD), etc. The combined use of the monitor makes it unique; the suction height of the sampling pump should be the smallest, and the entire pipeline system should be tight. 4.1.4.3 Sampling cables and other equipment In order to prevent contamination of the samples during the sampling process, the hydrological steel wire rope should be coated with non-metallic material or replaced with a plastic rope. Make the hammer respond Spray with PTFE, polyethylene and other materials. The hydrological winch should also take anti-fouling measures. The main technical parameters are. a) The rated load is 70 kg, and the maximum load is 80 kg; b) The length of hydrological rope is 100 m (Φ 4 mm); c) The horizontal angle of the bracket is 30°～80°; d) Rotation angle 360°; e) The weight of the whole machine is 50 kg; f) Direct reading mechanical counter; g) The parts of the whole machine can be disassembled and the installation is simple; h) The hydrological winch for collecting seawater metal samples is recommended to use Kevlar cable. 74.2.4 General requirements for on-site sampling operations a) The person in charge of the project or technology is responsible for coordinating the relationship between marine operations and ship navigation with the captain, on the premise of ensuring safety Navigation should meet the needs of monitoring operations; b) Obtain samples and data according to the requirements of the monitoring plan; c) The basic principle of the water sample packaging sequence is. the samples that do not need to be filtered are divided first, and the samples that need to be filtered are then divided; generally According to suspended solids and dissolved oxygen (biochemical oxygen demand) → pH → nutrient salts → heavy metals → chemical oxygen demand (others have Organic matter determination items) → chlorophyll a → phytoplankton (water sampling); such as chemical oxygen demand and weight Metal mercury needs to be tested in the non-filtered state, according to suspended solids and dissolved oxygen (biochemical oxygen demand) → chemical oxygen demand (other Organic matter determination items) → Mercury → pH → Salinity → Nutrients → Other heavy metals → Chlorophyll a → Phytoplankton (Water sampling) sequence; d) Complete the samples that should be tested on-site at sea within the specified time, and prepare the samples for off-site testing at the same time; e) Sampling matters. 1) 20 minutes before the ship arrives at the point, stop draining and flushing the deck, and close the toilet to the sea until monitoring End of homework 2) It is strictly forbidden to contaminate the sampled samples by hand to prevent the sample bottle stopper (cap) from being contaminated; 3) At the end of the observation and sampling, check for omissions immediately before notifying the ship to set sail; 4) Marine sampling should be stopped under special weather conditions such as heavy rain; 5) In case of red tides and oil spills, follow-up monitoring shall be carried out in accordance with the requirements of emergency monitoring regulations. f) After the sample is collected, it is necessary to try to keep the status of the item to be tested and the state at the time of sampling to ensure that the collected samples are qualified. Be representative and authentic; the sampling section, sampling point, and sampling of the monitored sea area must be checked before sampling Time, sampling frequency and number of samples are carefully considered and designed so that the collected samples can be analyzed It can objectively reflect and characterize the real situation of water bodies. 4.2.5 General steps for sample collection In view of the fluidity, variability and complexity of seawater, a standardized sampling procedure based on actual conditions is required. among them The procedures for the use of common water harvesters are as follows. a) Sampling from a single-layer water collector Fix the cleaned and specially treated sample bottle on the water collector, connect the bottle opener (stopper) device, and check the connection of each part Whether the connection is reliable; slowly put the water collector into the water body; after reaching the predetermined depth, open the bottle cap (plug) and observe from the water surface. When bubbles are bubbled, the sample bottle is quickly raised to the surface after it is full, and the lid is closed to obtain the desired sample. b) Closed-open-closed water collector sampling Fix the water collector, check whether the fixation is firm, open the lock device of the water collector, close the water outlet of the water collector; The water collector should be kept perpendicular to the water surface when the water is deep and the flow is rapid, the weight of the plumb hammer should be increased; the water collector should reach the predetermined depth After the temperature is reached, open the hammer to lock the water collector, and stop for a while to lift the water surface. Before aliquoting the sample, let out a small amount of water sample, Repackaging; avoid collisions and improper sampling during the sampling process. c) Pump sampling Connect the sampling device, turn on the vacuum pump, block the water inlet of the water sampling pipe, and check the sealing performance of the sampling system; The water inlet of the pipe is settled to the required depth through the wire rope (usually operated by a winch), and the vacuum pump is turned on for suction. When the sampling bottle is 8 After the water sample volume reaches more than 5 times the internal volume of the water sampling pipe, close the gas circuit and pour out the water in the sampling pipe; insert the upper end of the water sampling pipe To the bottom of the sampling bottle, pump the water sample at a rate of 1 L/min. After the sampling bottle is full of water samples, close the gas circuit and quickly Take out the water tube from the bottle and dispense the water sample into the sample bottle. d) Sampling in polyethylene barrels Before sampling, rinse the barrel with water sample for 2 to 3 times; when sampling, the barrel mouth is immersed in the water in the direction of the water flow. After the water fills the barrel, Raise the water surface quickly to avoid floating substances on the water surface from entering the sampling barrel (in general, barrel sampling is not used). 4.2.6 Sampling steps for special projects a) Collection of dissolved oxygen and biochemical oxygen demand samples The iodometric method is used to determine dissolved oxygen in water, and the water sample needs to be collected directly into a sample bottle. When sampling, be careful not to expose the water sample Gas or residual gas. If plexiglass water harvester, ball valve water harvester, inverted water harvester, etc. are used, the water body must be prevented from being disturbed. Dissolved oxygen samples must be collected first. Connect one end of the latex tube to the glass tube, and set the other end to the outlet of the water collector, Measure the water sample and wash the water sample bottle twice; insert the glass tube into the bottom of the analysis bottle, slowly inject the water sample, and wait until the water sample is full and overflows approximately When the volume of the bottle is 1/2, slowly withdraw the glass tube; immed......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of HJ 442.3-2020_English be delivered?Answer: Upon your order, we will start to translate HJ 442.3-2020_English as soon as possible, and keep you informed of the progress. The lead time is typically 4 ~ 6 working days. 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