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Test strips Aquadur®

Test strips Aquadur®

SKU C725.1
€ 31,40
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Test strips Aquadur®
Product Details
HS code: 38229000
EAN: 8721028022493
Brand: Macherey-Nagel

Oriënterende sneltest voor de halfkwantitatieve bepaling van de waterhardheid (totale hardheid).Meetbereik van 0 °d tot boven 25 °d. Omrekening: 1 °d = 1,8 °f = 1,25 °e = 17,8 mg/l CaCO3.Een verpakking bevat 100 teststrookjes B 6 x L 95 mm.


Toepassing:De teststrookjes worden kort in het te meten water gedompeld. Na ongeveer een minuut de opgetreden verkleuring vergelijken met een kleurschaal en het hardheidsbereik aflezen.Voorzichtig: het testpapier mag niet met de vingers worden aangeraakt.



Teststrookjes Aquadur®

Technische informatie
Bewijs van Waterhardheid (totale hardheid)
Indeling <3 °d, >5 °d, >10 °d, >15 °d, >20 °d, >25 °d µg/m³

Determination of Water Hardness

Water contains a whole host of salts and other compounds in addition to the gases dissolved in it (oxygen, nitrogen, carbon dioxide). Its most important constituents are magnesium and calcium in the form of their chlorides, sulphates and bicarbonates. These dissolved salts are known as hardeners. The bicarbonates precipitate in the heat (during boiling) as carbonates and are known as carbonate hardness or temporary hardness. The sulphate and chloride compounds are known as permanent hardness or non-carbonate hardness. Total hardness describes the concentration of alkaline earth metal ions in water.

The unit of measurement for water hardness used to be 1 °dH (German degrees of hardness), which corresponds to 10,00 mg CaO or 7,19 mg MgO in one litre of water. Today we use millimoles per litre (mmol/l), whereby 1 °dH corresponds to 0,18 mmol/l of earth metal ions and 1 mmol/l corresponds to 5,6 °dH.


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