DIN 38409 German Standard Methods for Inspection of Water, Waste Water and Sludge - Effects and Parameters Characterizing Substances (Group H)

In general, multiple test methods and laboratory techniques are used to detect and measure various contaminants in waters, wastewater and sludge. Laboratory controls take into account method performance and data quality, ensuring results are comparable. Depending on the contaminant levels in wastewater, methods are adapted to higher or lower detection limits as needed. For example, if the levels of certain contaminants in the wastewater are high enough, small volumes of wastewater can be tested without additional concentration processes. Test methods include sample processing steps, use of laboratory controls, and application of biosafety measures to ensure data can be interpreted for public health use.

Sample processing, sample preparation, sample concentration and different measurement methods are applied in the testing of water and wastewater. The methods chosen at each step are tailored for use with wastewater, a complex and variable mixture of chemical and biological, and the performance of wastewater sample handling procedures is evaluated using appropriate laboratory controls.

Proper storage and preparation of wastewater samples ensures accurate measurements. Samples are cooled to 4 degrees immediately after collection and processed within 24 hours to increase surveillance benefit. If it cannot be processed within 24 hours, a matrix recovery check is performed on the sample before cooling it at 4 degrees or freezing at minus 20 or minus 70 degrees.

Both liquid effluent and primary sludge samples must be thoroughly mixed (homogenized) before removing portions of effluent collected for the downstream process. The homogenization process may include additional procedures to break up samples effluent solids and separate virus particles.

The DIN 38409 standard, published by the German Standardization Institute (DIN), consists of the following subheadings under the main heading "German standard methods for water, wastewater and sludge inspection - Parameters characterizing effects and substances (H group)":

• DIN 38409-1 Determination of total dry residue, filtrate dry residue and ignition residue (H 1)
• DIN 38409-2 Determination of filterable substance and combustion residue (H 2)
• DIN 38409-3 Determination of total organic carbon (TOC) (H 3)
• DIN 38409-5 Determination of the permanganate index (H 5)
• DIN 38409-6 Water hardness (H 6)
• DIN 38409-7 Determination of acid and base neutralization capacities (H 7)
• DIN 38409-8 Determination of extractable organically bound halogens (EOX) (H 8)
• DIN 38409-9 Determination of settleable matter by volume in water and waste water (H9)
• DIN 38409-10 Determination of settleable matter by mass concentration in water and wastewater (H 10)
• DIN 38409-20 Determination of substances that react with disulphine blue (H 20)
• DIN 38409-22 Determination of adsorbable and organically bound halogens dissolved in salt water (SPE-AOX) (H 22)
• DIN 38409-23 Determination of bismuth active substances (H 23)
• DIN 38409-26 Determination of bismuth chelating index I (H 26)
• DIN 38409-27 Determination of total bound nitrogen TN (H 27)
• DIN 38409-28 Devarda alloy and determination of bound nitrogen after reduction by catalytic cracking (H 28)
• DIN 38409-29 Determination of dissolved, adsorbable organically bound fluorine compounds (AOF) (H 29)
• DIN 38409-31 Spectrometric determination of sulfur-sulfur and mercaptan sulfur (H 31)
• DIN 38409-32 Determination of dissolved adsorbable and organically bound halogens after solid phase extraction (SPE-DOX) (H 32)
• DIN 38409-41 Determination of chemical oxygen demand (COD) in the range of 15 mg/l (H 41)
• DIN 38409-43 Determination of chemical oxygen demand (COD); short-term method (H 43)
• DIN 38409-44 Determination of chemical oxygen demand (COD) ranging from 5 to 50 mg/l (H 44)
• DIN 38409-46 Part 46: Determination of degradable organic carbon (POC) (H 46)
• DIN 38409-51 N determination of biochemical oxygen demand after days, BOD, using dilution method (H 51)
• DIN 38409-52 Determination of oxygen depletion after N days (H 52)
• DIN 38409-56 Gravimetric determination of low volatile lipophilic substances after solvent extraction (H 56)
• DIN 38409-59 Determination of adsorbable organically bound fluorine, chlorine, bromine and iodine (AOF, AOCl, AOBr, AOI) using combustion and subsequent ion chromatographic measurement (H 59)
• DIN 38409-60 Spectrometric determination of chlorophyll-a concentration in water (H 60)

Our organization, among the numerous test, measurement, analysis and evaluation studies it has given for businesses in various sectors, with its trained and expert staff and advanced technological equipment, within the scope of DIN 38409 standard, water, waste water and sludge inspection, effects and parameters characterizing substances (H). group) also provides testing services.