Camlab Lovibond MD 610, Instruction Manual

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MD 610_2d 11/2019
Notes:
1. Vial cleaning:
As many household cleaners (e.g. dishwasher detergent) contain reducing
substances,the subsequent determination of Bromine may show lower results. To avoid
any measurement errors, only use glassware free of Chlorine demand.
Preparation: Put all applicable glasswareinto Sodium hypochlorite solution (0.1 g/l)
forone hour, then rinse all glasswarethoroughly with deionised water.
2. Preparing the sample:
When preparing the sample, the lost of Bromine, e.g. by pipetting or shaking, must be
avoided. The analysismust take place immediately after taking the sample.
3. The DPDcolour development is carried out at a pH value of 6.2 to 6.5. The reagent
tablet therefore contains a buffer for the pH adjustment. Strong alkaline or acidic water
samplesmust be adjusted between pH 6 and pH 7 before the reagent is added
(use 0.5 mol/l Sulfuric acid resp. 1 mol/l Sodium hydroxide).
4. Exceeding the measuring range:
Concentrations above 4.5 mg/l Bromine can lead to results showing 0 mg/l.
In this case,the water sample must be diluted with water free of Bromine.
10 ml of the diluted sample should be mixed with the reagent and the measurement
repeated.
5. Alternatively a Chlorine FREE-DPD/F10powder pack may be used for the determination
of some bromine compounds. Pleasefollow the directions of the bromine compound
manufacturer where necessary.
6. Oxidising agents such as Chlorine, Ozone etc. interfere as they react in the same way as
Bromine.
Reagent Form of reagent/Quantity Order-No.
Chlorine Total-DPD/F10 Powder Pack / 100 530120
Clorine Free-DPD/F10 Powder Pack / 100 530100