Karl Fischer Water Content Determination

in Food, Beverages and Cosmetics

Introducing the newest addition to Hanna’s family of Titration Systems: the HI 904 Coulometric Karl Fischer Titrator.

The HI 904 excels at determining water content in extremely small concentrations (1 ppm to 5%) and requires no titrant,

instead using a generator electrode.

A pulsed DC current is applied to the generator electrode and results in oxidation of free iodide to iodine (the titrant) at the

platinum anode. Alcohol, sulfur dioxide and base (pyridine or imidazole) present in the reagents react to form a salt that is

oxidized by the generated iodine.

This reaction consumes water present in the cell in a 1:1 ratio (iodine:water). Once all of the water is consumed, the excess

iodine is detected using a bilvoltammetric detector electrode and signals the end of the titration. The result is calculated from

the amount of current applied to complete the reaction and the length of time that the generator electrode is active (A•s, or

Coulombs).

The HI 903 Karl Fischer Volumetric Titrator is an

extension of HANNA’s highly successful potentiometric

Titrator platform.

The HI 903 combines an ultra-high precision titrant

delivery system with optically regulated magnetic stirring

and sophisticated endpoint determination, dynamic

dosing and background drift correction algorithms.

The HI 903 comes equipped with a solvent handling

system to reduce cell conditioning time and can be

connected directly to your laboratory balance via serial

interface.

The HI 903’s powerful software and intuitive menus are

easily navigated on the large color LCD display making it

simple to view results, choose from included methods or

develop a custom method for almost any application or

sample type.

The result is an extremely adaptable Titrator capable of

titrating with superior accuracy and precision even for

samples with low moisture content.

Fats, oils and dairy products

Samples : edible oil, butter, margarine, milk powders, yoghurt, ice cream, cheese

Grains, Starchy Foods

Samples : Flour, biscuits, cereals, noodles,

Spice & Dehydrated Products

Samples: Pepper, curry, salt, mixed spice, mustard, instant coffee

Beverages and concentrates

Samples : cognac, beer, wine, liquor, orange juice, tomato juice, black currant syrup, instant ice tea

Sugar and Sugar Products:

Samples: Saccharose, cane sugar, honey, jelly, jam, chocolate

Cosmetics

Samples : shampoo, aftershave, day cream, sun lotion, lipstick, massage oil, toothpaste

Various Foodstuffs:

Samples: hazelnuts, cocoa powder, tea, coffee beans, tobacco, instant pudding powder,

Chocolate flavour

PRODUCT RANGE

With Great Products, Come Great Results™