GBL® AQUA-ROSA

7012-Total Hardness Kit; Titrimetric (1 AS)

Title Description
REF No 7012
Purpose It is used for the determination of total hardness in waters with low alkalinity.
Ingredients Methyl red, eriochrome black T, ethanol 96%, etta disodium salt, magnesium chloride, tris base, triethanolamine.
Working Principle
Warnings, Precautions, Recommendations Not classified as hazardous according to the Regulation on SEA of Substances or Mixtures (OG 11.12.2013 No: 28848 bis) and Directive 1272&2008 [CLP/GHS](EC).
Application 1) Take the 20 ml measured transparent container from the set box.
2) Add the water sample to be analysed up to the 5 ml mark.
3) Total Hardness Test without Alkalinity; 1 drop is added and mixed by holding the dropper mouth of the titrimetry bottle at a right angle of 90 degrees. Care should be taken to ensure that the drops do not have air bubbles.
4) If a red-pink colour is formed, continue to add dropwise the Total Hardness Test Kit without Alkalinity; titrimetric.
5) Stir after each drop.
6) Continue dripping until the colour turns bluish green.
7) When a bluish green colour is formed, the titration is terminated.
Theoretical Results
The number of drops spent gives the total hardness of the water sample.
1 Drop = 1 AS (GERMAN HARDNESS) = 10 mg/l CaO = 1,79 FS
Hardness Presence Pinkish red. End Point Bluish green
Related Media
Shelf Life 2 years
Shelf Life After Opening the Lid After opening the lid, it can be used throughout its expiry date when stored under recommended storage conditions.
Storage Temperature 5/25 °C
pH (at 25°C)
Transportation Information Carriage/shipment by road (ADR/RID) - UN1993, Ethanol 96%, 3, II
Carriage/shipment by sea (IMDG) - UN1993, Ethanol 96%, 3, II
Carriage/shipment by air (ICAO/IATA) - UN1993, Ethanol 96%, 3, II
Ordering and Packaging Information
Order No Unit Volume Packaging Type Quantity in a Carton Quantity in a Box
457012030050 Kit 50 ml 50 ml, HDPE White Bottle with Dropper 1 80

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