BS EN 15482:2012 pdf download
BS EN 15482:2012 pdf download.Chemicals used for treatment of water intended for human consumption一Sodium permanganate.
4 PurIty criteria
4.1 General
This European Standard specifies the minimum punty requirements fox sodium permanganate used for the treatment of water intended for human cOnsumption. Limits are given for Impunties commonly present In the product Depending on the raw matenal and the manufacturing process other Impurities may be present and, If so, the user and when necessary relevant authorities shall be notifled.
Users of this product should check the national regulations to c*anfy whether it is of appropriate purity for treatment of water intended for human consumption, taking into account raw water quality, required dosage, contents of other impurities and additives used in the product not stated in this product standard,
Limits have been given for impurities and chemical parameters where these are likely to be present in signticant quantities front the current production process and raw materials. If the production process or raw materials leads to signifant quantities of Impurities, by-products or additives being present, the user shall be notified
4.2 Composition of commercial product
The sodium perrnanganate is usually available ii a concentrated solution with a concentration within the range of mass fraction of 20 % to 40 %.
The concentration of sodium pernianganate solution shall be equal to or greater than the manufacturer specified value.
4.3 Impurities and main by-products
The content of manganese dioxide (insoluble matter) shall be no more than a mass fraction of 0.055 %.
NOTE The product n contain fluoride or hexafluoroellicale. At tpEcal levels of dosing, the added fluonde would be lessthan 40 pg/l.
4.4 Chemical parameters
The content of chemical parameters shall conform to the requirements specified in Table 2.
5 Test methods
5.1 Sampling
5.1.1 General
Observe the general recommendations of ISO 3165 and take account those of ISO 6206.
5.1.2 Sampling from drums and bottles
5.1.2.1
General
5.1.2.1.1 Mix the contents of each container to be sampled by shaking the container, by rling it or by rocking it from side to side. taking care not to damage the container or spill any of the liquid.
5.1.2.1.2 If the design of the container is such (for example, a narrow-necked bottle) that it is impracticable to use a sampling implement, take a sample by pouring after the contents have been thoroughly mixed. Otherwise, proceed as described in 5.1.2.1.3.
5.1.2.1.3
Examine the surface of the liquid. If there are signs of surface contamination, take samples from the surface as described in 5.1.2.2. Otherwise, take samples as described in 5.1.2.3.
5.1.2.2
Surface sampling
Take a sample using a suitable ladle. Lower the ladle into the liquid until the rim is just below the surface, so that the surface layer runs into it. Withdraw the ladle just before it flls completely and allow any liquid adhering to the ladle to drain off. If necessary, repeat this operation so that, when the other selected containers have been sampled in a similar manner, the total volume of sample required for subsequent analysis is obtained.
5.1.2.3
Bottom sampling
Take a sample using an open sampling tube, or a bottom-valve sampling tube, suited to the size of container and the viscosity of the liquld.
When using an open sampling tube, close it at the top and then lower the bottom end to the bottom of the container. Open the tube and move it rapidly so that the bottom of the tube traverses the bottom of the container before the tube is fld. Close the tube, withdraw it from the container and allow any liquid adhering
to the outside of the tube to drain off.
When using a bottom-valve sampling tube, close the valve before lowering the tube into the container and
then proceed in a similar manner to that when using an open sampling tube.
5.1.3 Sampling from tanks and tankers
From each access point, take samples as fllows:
a) from the surface of the liquid, using a ladle as described in 5.1.2.2;
b) from the bottm of the tank or tanker, using a sampling tube as descnibed in 5.1.2.3 or using a specially
designed bottom-sampling apparatus;
c) from one or more positins, depending on the overall depth, between the bottom and the surface using a weighted sampling can.
