Karl Fischer Reagents and Water Standards for Volumetric Karl Fischer Titrators

ONE-COMPONENT VOLUMETRIC REAGENTS/COMPOSITES

  • COMPOSITE 1/CC34827; A reagent for Volumetric Karl Fischer titrators. Hydranal Composite 1 is a one-component reagent. General one-component reagent 1mL=approx. 0.7-1.0mg H2O
  • COMPOSITE 2/CC34806; A reagent for Volumetric Karl Fischer titrators. Hydranal Composite 2 is a one-component reagent. General one-component reagent 1mL=approx. 2.0mg H2O
  • COMPOSITE 5/CC34805; A reagent for Volumetric Karl Fischer titrators. Hydranal Composite 5 is a one-component reagent. General one-component reagent 1mL=approx. 5.0mg H2O (This is one of the most popular volumetric reagents used!)
  • COMPOSITE 5K/CC34816; A reagent for Volumetric Karl Fischer titrators. Hydranal Comp. 5K is designed to work with samples containing ketones & aldehydes.. (1 mL=appox. 5.0 mg H20)

WORKING MEDIUM SOLVENTS TO BE USED WITH COMPOSITES

  • METHANOL DRY/CC34741; A solvent for Volumetric Karl Fischer titrators. This custom made solvent has a maximum water content of 100ppm - 0.01%
  • COMPOSOLVER E/CC34734; A solvent for Volumetric Karl Fiacher titrators. This ethanol-based working medium is formulated for use with the standard one-component Hydranal Composites (Comp5,Comp2,Comp1). It permits a methanol-free analysis using the single component composite reagents.
  • WORKING MEDIUM K/CC34817; A solvent for Volumetric Karl Fischer titrators. This solvent is designed to work with Hydranal Composites (specifically Composite 5K) This solvent contains chloroethanol and chloroform. For the determination of water in aldehydes and ketones.
  • MEDIUM K/CC34698; A solvent for Volumetric Karl Fischer titrators testing samples with ketones & aldehydes. This working medium solvent is to be used with the Hydranal (volumetric) composites (Comp5,Comp2,Comp1). This solvent contains chloroform to aid in sample solubility.
  • KETOSOLVER/CC34738; A reagent for Volumetric Karl Fischer titrators. This is a specialty one-component volumetric Karl Fischer reagent for working with ketones & aldehydes. Suppresses side reactions that generate water or consume titrant. Contains no halogenated compounds Lacks chloromform so does not aid in solubility.

TWO-COMPONENT VOLUMETRIC REAGENTS

  • TITRANT 2;/CC34811; A reagent for Volumetric Karl Fischer titrators. This is a two-component volumetric Karl Fischer reagent . One ml of Titrant 2 is equivalent 2.0+-0.01mg H2O. A note about two-component reagents: With two-component reagents the reactants are in separate bottles. The titrant is a solution of iodine and alcohol. The solvent solution contains the sulpher dioxide and imidazole in a specific alcohol. The reagents remain stable and unchanged for a minimum of two years as long as the bottle remains unopened.
  • TITRANT 5;/CC34801; A reagent for Volumetric Karl Fischer titrators. This is a two-component volumetric Karl Fischer reagent . One ml of Titrant 5 is equivalent 5.0+-0.02mg H2O. A note about two-component reagents: With two-component reagents the reactants are in separate bottles. The titrant is a solution of iodine and alcohol. The solvent solution contains the sulpher dioxide and imidazole in a specific alcohol. The reagents remain stable and unchanged for a minimum of two years as long as the bottle remains unopened.

SOLVENTS 

  • SOLVENT/CC34800; A solvent for Volumetric Karl Fischer titrators. This solvent is to be used with the two-component volumetric reagents (Titrant 1, Titrant 2). This is a methanol based solvent for volumetric Karl Fischer applications. A note about two-component reagents: With two-component reagents the reactants are in separate bottles. The titrant is a solution of iodine and alcohol. The solvent solution contains the sulpher dioxide and imidazole in a specific alcohol. The reagents remain stable and unchanged for a minimum of two years as long as the bottle remains unopened.
  • SOLVENT CM/CC34812; A solvent for Volumetric Karl Fischer titrators. This solvent is to be used with the standard one-component Hydranal Composites (Comp5,Comp2,Comp1). This solvent contains methanol and chloroform for the determination of non-polar samples like fats & oils.
  • SOLVENT OIL/CC34749; A solvent for Volumetric Karl Fischer titrators. This solvent is to be used with the two-component volumetric reagents (Titrant 1, Titrant 2). This solvent is for the determination in non-polar substances like fats & oils. Contains methanol and hexane. A note about two-component reagents: With two-component reagents the reactants are in separate bottles. The titrant is a solution of iodine and alcohol. The solvent solution contains the sulpher dioxide and imidazole in a specific alcohol. The reagents remain stable and unchanged for a minimum of two years as long as the bottle remains unopened.
  • WATER STANDARD 1.0/CC34828;A water standard for Coulometric Karl Fischer titratiors (1,000PPM). A certified standard containing 1.00mg of H2O per g (1g = 1.0ml). A manufacturer's test certificate with exact specifications is included. Test objective is 1,000PPM +- 3%
  • WATER STANDARD 0.1/CC34847;A water standard for Coulometric Karl Fischer titratiors (100PPM). A certified standard containing 0.1mg of H2O per g (1g = 1.16ml). This standard contains xylene. The specific gravity of this water standard is approx. 0.86. A manufacturer's test certificate with exact specifications is included. Test objective is 100PPM +- 10%
  • WATER STANDARD 10.0/CC34849;A water standard for Coulometric and Volumetric Karl Fischer titrators (10,000PPM). A certified standard containing 10.0mg of H2O per g (1g = 1.16ml). A manufacturer's test certificate with exact specifications is included. A 1% (10,000PPM) standard.
[fa icon="plus"] I have ketones and or aldehydes in my samples. What reagents should i use?
You will want to be using a dual reagent setup for this tesing and use Coulomat AK (anolyte) and the CG-K (catholyte).
[fa icon="plus"] What packaging sizes are available?
The anolytes come in 500mL and 1 liter bottles.  You can also get cases of these combinations.  Catholytes come in 50mL bottles and ampules (10 per pack).  Water standards come in ampules (10 per pack).
[fa icon="plus"] How long wil my reagents last?

This is a popular question!  It depends.  Three things generally factor into the useful life of these reagents including:

  • The reagent itself has a finite amount of water that it can measure (see note).
  • Time the reagent has been open, exposed and in use. Over long periods of time the reagents will become weaker.
  • Capacity of the titration vessel.  Once it's full with sample you will need to drain and start over.  

note:  For our example assume a typical titration vessel can hold 100mL of anolyte reagent.  The following then would apply:

  • Coulomat A, AG, AG-H can measure 1,000,000 micrograms of water.  
  • Coulomat AK can measure 100,000 micrograms of water.
  • Coulomat oil can measure 300,000 micrograms of water.

If you are using a dual reagent setup the following then would apply:

  • A 5mL ampule of Coulomat CG catholyte solution will measure 300,000 micrograms of water.
  • A 5mL ampule of Coulomat CG-K catholyte solution will measure 100,000 micrgrams of water.

Remember your Karl Fischer Titrator measures moisture in micro grams so you can use this math to help figure it out:

PPM = WATER DETECTED (in micro grams)/SAMPLE SIZE (in grams)