TP208 - Pravilnik o imisijskem monitoringu kakovosti površinske vode za življenje sladkovodnih vrst rib

This part of ISO 5815 specifies the determination of the biochemical oxygen demand of waters by dilution and seeding with suppression of nitrification after 5 d incubation time.
This part of ISO 5815 is applicable to all waters having biochemical oxygen demands usually between 3 mg/l and 6 000 mg/l. It applies particularly to waste waters. For biochemical oxygen demands greater than 6 000 mg/l of oxygen, the method is still applicable, but the errors caused by the necessary dilutions can influence the analytical quality of the test method. Then the results are to be interpreted
with circumspection.
The results obtained are the product of a combination of biochemical and chemical reactions with participation by living matter which behaves only with occasional reproducibility. They do not have the rigorous and unambiguous character of those resulting from, for example, a single, well-defined, chemical process. Nevertheless, they provide an indication from which the quality of waters can be estimated.

This European Standard specifies determination of the biochemical oxygen demand of waters of undiluted samples. This standard is applicable to all waters having biochemical oxygen demands greater than or equal to the limit of determination 0,5 mg/l of oxygen and not exceeding 6 mg/l of oxygen.

This document specifies a method for the determination of free chlorine and total chlorine in water,
readily applicable to lab- and field-testing. It is based on measurement of the absorption, the red DPD
colour complex in a photometer or the colour intensity by visual comparison of the colour with a scale
of standards that is regularly calibrated.
This method is appropriate for drinking water and other waters, where additional halogens like
bromine, iodine and other oxidizing agents are present in almost negligible amounts. Seawater and
waters containing bromides and iodides comprise a group for which special procedures are to be
carried out.
This method is in practice applicable to concentrations, in terms of chlorine (Cl2), from, for example,
0,000 4 mmol/l to 0,07 mmol/l (e.g. 0,03 mg/l to 5 mg/l) total chlorine. For higher concentrations, the
test portion is diluted.
Commonly, the method is applied as a field method with mobile photometers and commercially available
ready-for-use reagents (liquid reagents, powders and tablets). It is essential that those reagents comply
with minimum requirements and contain the essential reagents and a buffer system suitable to adjust
the measurement solution to a pH range of typically 6,2 to 6,5. If there is doubt that water samples
have uncommon pH values and/or buffer capacities, the user has to check and, if necessary, to adjust
the sample pH to the required range. The pH of the sample is within the range of pH 4 and 8. Adjust, if
necessary, with sodium hydroxide solution or sulfuric acid before the test.
A procedure for the differentiation of combined chlorine of the monochloramine type, combined
chlorine of the dichloramine type and combined chlorine in the form of nitrogen trichloride is
presented in Annex A. In Annex C, a procedure is presented for the determination of free and total
chlorine in drinking and other low polluted waters, for disposable planar reagent-filled cuvettes using a
mesofluidic channel pump/colorimeter.

This part of ISO 5667 sets out the principles to be applied to the design of sampling programmes, sampling techniques, and the handling of water samples from rivers and streams for physical and chemical assessment. It is not applicable to the sampling of estuarine or coastal waters nor for microbiological sampling.
NOTE 1 Procedures for microbiological sampling are given in ISO 19458.
This part of ISO 5667 is neither applicable to the examination of sediment, suspended solids or biota, nor to dammed stretches of rivers or streams. Also, it is not applicable to passive sampling of surface waters (see ISO 5667‑23).
NOTE 2 In cases where naturally occurring or artificially constructed dams result in the retention or storage of water for several days or more, the stretch of the river or stream should be considered as a standing water body. For sampling purposes, see ISO 5667‑4.

This International Standard specifies an electrochemical method for the determination of dissolved oxygen in water by means of an electrochemical cell which is isolated from the sample by a gas permeable membrane. Measurement can be made either as a concentration of oxygen in milligrams per litre, percentage saturation (% dissolved oxygen) or both. The method measures oxygen in water corresponding to 1 % to 100 % saturation. However, most instruments permit measurement of values higher than 100 %, i.e. supersaturation. The method measures oxygen in water with a saturation higher than 100 %, when special arrangements to prevent the outgassing of oxygen during the handling and measurement of the sample are made. The method is suitable for measurements made in the field and for continuous monitoring of dissolved oxygen, as well as measurements made in the laboratory. It is the preferred method for highly coloured and turbid waters, and also for analysis of waters not suitable for the Winkler titration method because of iron- and iodinefixing substances, which can interfere in the iodometric method specified in ISO 5813[1]. The method is suitable for drinking waters, natural waters, waste waters, and saline waters. If used for saline waters, such as sea or estuarine waters, a correction for salinity is essential.

ISO 10523:2008 specifies a method for determining the pH value in rain, drinking and mineral waters, bathing waters, surface and ground waters, as well as municipal and industrial waste waters, and liquid sludge, within the range pH 2 to pH 12 with an ionic strength below I =  0,3 mol/kg (conductivity at 25 �C <2 000 mS/m) solvent and in the temperature range 0 �C to 50 �C.

This International Standard specifies a method for the determination of dissolved elements, elements bound to particles ("particulate“) and total content of elements in different types of water (e.g. ground, surface, raw, potable and waste water) for the following elements:
Aluminium, antimony, arsenic, barium, beryllium, bismuth, boron, cadmium, calcium, chromium, cobalt, copper, gallium, indium, iron, lead, lithium, magnesium, manganese, molybdenum, nickel, phosphorus, potassium, selenium, silicon, silver, sodium, strontium, sulfur, tin, titanium, tungsten, vanadium, zinc and zirconium.
Taking into account the specific and additionally occurring interferences, these elements can also be determined in digests of water, sludges and sediments (for example digests of water as specified in ISO 15587 1 or ISO 15587 2). The method is suitable for mass concentrations of particulate matter in waste water below 2 g/l. The scope of this method may be extended to other matrices or to higher amounts of particulate matter if it can be shown that additionally occurring interferences are considered and corrected for carefully. It is up to the user to demonstrate the fitness for purpose.
Recommended wavelengths, limits of quantification and important spectral interferences for the selected elements are given in Clause 5 (Table 1).

This European Standard describes a method for the determination of suspended solids in raw waters, waste waters and effluents by filtration through glass fibre filters. The lower limit of the determination is about 2 mg/l. No upper limit has been established. Water samples are not always stable which means that the content of suspended solids depends on storage time, means of transportation, pH value and other circumstances. Results obtained with unstable samples should be interpreted with caution.

This European standard specifies methods for the determination of orthophosphate (see clause three); orthophosphate after solvent extraction (see clause four); hydrolysable phosphate plus orthophosphate (see clause five); total soluble phosphorus and total phosphorus after decomposition (see clauses six and seven). The methods are applicable to all kinds of water including seawater and effluents. Phosphorus contents within the range of 0,005 to 0,8 mg per litre may be determined in such samples without dilution.

The method will give a general guide for the determination of metals by flameless AAS.

This part of ISO 7393 specifies a titrimetric method for the determination of free chlorine and total chlorine in water, especially in drinking water or water in swimming pools, in the concentration range 0,0004 mmol/l to 0,07 mmol/l.

According to the methods specified in this document nitrite and nitrate by be determined in large sample series and a high analysis frequency. The method includes an automatic dosage.

Specifies the so-called Winkler procedure modified in order to make allowance for certain interferences. It is the reference procedure and applicable to all types of water having concentrations greater than 0,2 mg/l, up to double saturation, which are free from interfering substances.

Specifies three methods: 1. for direct determination; 2. for determination after chelation (APDC) and extraction (MIBK); 3. for determination after chelation (HMA-HMDC) and extraction (DIPK-Xylen).

Specifies a procedure using an ammonia-sensing membrane probe for raw and waste water and sewage. The procedure is applicable to ammonium nitrogen concentration of up to 50 mg/l.The limit of detection is defined as the limit of Nernstian response under the conditions specified and has a value corresponding to approximately 0,2 mg/l.

Migrated from Progress Sheet (TC Comment) (2000-07-10): Result of the merginf of WIs 3, 5-8 (TC Res. 30/1997)

The procedure is applicable to the analysis of potable water, and most raw and waste waters. Application to excessively coloured or saline waters shall be preceded by distillation. An ammonium nitrogen concentration of up to 1 mg/l, using the maximum test portion of 40 ml, can be determined. Much higher concentrations can be determined by taking smaller test portions.