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KF Coulometrar
KF Coulometrar

KF Coulometrar

Att bestämma låg fukt- och vattenhalt i prover är inget problem för dessa coulometrar.

FördelarnaSystemenErfarenheterna

Kort om

Coulometrisk Karl Fischer-titrering är den idealiska metoden för att bestämma låga fukt- och vattenhalter i prover (0,001 till 1 % vattenhalt). Vårt sortiment av coulometrar täcker de flesta villkor och kan kombineras med KF ugnsmetoden för svåra prover.

 

  • Noggrann och tillförlitlig bestämning av vattenhalter på spårnivå i intervallet 0,001 till 1 %
  • Olika coulometerversioner tillgängliga. Exempelvis fristående eller datorstyrda
  • Svåra prover kan enkelt analyseras med ugnsmetoden
  • Överensstämmelse med FDA Regulation 21 CFR Part 11 och EudraLex, Volume 4, Annex 11

Fördelarna

En mängd olika coulometrar

Metrohm erbjuder olika coulometrar för att möta dina förutsättningar. Kontakta oss för att lära dig mer om våra coulometrar.

Coulometer Funktioner
Titrando coulometer
  • Avancerad coulometer för dina behov
  • Styrning via programvara eller via touch-styrenhet
  • Regelefterlevnad (t.ex. 21 CFR Part 11)
  • Automatisering och provberedningsalternativ
  • Automatisk provinjektion och igenkänning av titreringsstart
Ti-Touch coulometer
  • Kompakt och fristående coulometer
  • Alla komponenter integrerade i ett hölje
  • Pekskärmsdrift, exakta resultat och säker hantering
  • Regelefterlevnad (21 CFR Part 11)
Eco Coulometer
  • Utrymmesbesparande coulometer
  • Beröringskänslig display
  • Integrerad magnetomrörare
OMNIS coulometer
  • High-end coulometric titrator for all your needs
  • Modular concept for maximum flexibility
  • Software control
  • Regulatory compliance (ie. 21 CFR part 11)
  • Automation and sample preparation options
  • Automatic sample injection and titration start recognition  

Broschyr: OMNIS Coulometer and OMNIS Sample Robot Oven (8.000.5475, PDF, 2,8 MB)

Provberedning och automatisering för coulometrisk KF-titrering

https://metrohm.scene7.com/is/image/metrohm/4205?ts=1640800194237&dpr=off

För svåra prover, t.ex. fasta prover eller prover som inte lätt löser sig, kan du använda KF-ugnsmetoden. I denna metod värms provet i en ugn tills vattnet släpps, och vattenångan överförs till titreringskärlet för mätning.

Vi erbjuder både manuella ugnar och automatiserade provväxlare med integrerade ugnar för ökad provgenomströmning.

 

Mer om provpreparering för KF titration

Systemen

OMNIS Coulometer without stirrer

OMNIS Coulometer without stirrer

2.1018.0010

OMNIS Coulometer without magnetic stirrer for stand-alone operation or as the heart of an OMNIS titration system. The coulometer can be enhanced with additional titration, dosing or coulometer modules.Coulometry is the ideal method for water content determination in the trace range (10 μg to 10 mg absolute water content) in liquids, solids and gases. In addition, coulometric Karl Fischer titration is an absolute method making titer determination unnecessary.

OMNIS Coulometer with stirrer

OMNIS Coulometer with stirrer

2.1018.0020

OMNIS Coulometer with magnetic stirrer for stand-alone operation or as the heart of an OMNIS titration system. The coulometer can be enhanced with additional titration, dosing or coulometer modules.Coulometry is the ideal method for water content determination in the trace range (10 μg to 10 mg absolute water content) in liquids, solids and gases. In addition, coulometric Karl Fischer titration is an absolute method making titer determination unnecessary.

OMNIS Coulometer Module without stirrer

OMNIS Coulometer Module without stirrer

2.1019.0010

Coulometer module without magnetic stirrer for connection to an OMNIS Titrator or to an OMNIS Coulometer as enhancement to include a measuring interface.

OMNIS Coulometer Module with stirrer

OMNIS Coulometer Module with stirrer

2.1019.0110

Coulometer module with magnetic stirrer for connection to an OMNIS Titrator or to an OMNIS Coulometer as enhancement to include a measuring interface.

Eco Coulometer with generator electrode with diaphragm

Eco Coulometer with generator electrode with diaphragm

2.1028.0010

The Eco Coulometer with integrated magnetic stirrer and touch-sensitive display is ideal for water content determination in the 10 µg to 200 mg absolute water range. Predefined methods enable a smooth and easy instrument start-up. In addition to GLP-compliant printouts on paper or as PDFs, the Eco Coulometer also offers the option of being able to connect balances or send determination data to a PC via PC / LIMS reports. Indicator electrode and generator electrode with diaphragm are included in the scope of delivery.Coulometry is the ideal method for water content determination in the trace range in liquids, solids and gases. In addition, coulometry is an absolute method making titer determination unnecessary. 

Eco Coulometer with generator electrode without diaphragm

Eco Coulometer with generator electrode without diaphragm

2.1028.0110

The Eco Coulometer with integrated magnetic stirrer and touch-sensitive display is ideal for water content determination in the 10 µg to 200 mg absolute water range. Predefined methods enable a smooth and easy instrument start-up. In addition to GLP-compliant printouts on paper or as PDFs, the Eco Coulometer also offers the option of being able to connect balances or send determination data to a PC via PC / LIMS reports. Indicator electrode and generator electrode without diaphragm are included in the scope of delivery.Coulometry is the ideal method for water content determination in the trace range in liquids, solids and gases. In addition, coulometry is an absolute method making titer determination unnecessary.

851 Titrando with generator electrode with diaphragm

851 Titrando with generator electrode with diaphragm

2.851.0010

Coulometer including generator electrode with diaphragm and 801 Magnetic Stirrer.Coulometry is the ideal method for water content determination in liquids, solids, and gases when it comes to water content determination in the trace range (10 µg to 10 mg absolute water). In addition, coulometry is an absolute method and thus no titer determination is necessary.Coulometric titrations are carried out easily and quickly with the 851 Titrando.Recommended measuring range: 10 µg - 200 mg absolute waterFor use with OMNIS Software, tiamo software, or Touch Control unit. Compliance with GMP/GLP and FDA regulations such as 21 CFR Part 11, if required

851 Titrando with generator electrode without diaphragm

851 Titrando with generator electrode without diaphragm

2.851.0110

Coulometer including generator electrode without diaphragm.Coulometry is the ideal method for water content determination in liquids, solids, and gases when it comes to water content determination in the trace range (10 µg to 10 mg absolute water). In addition, coulometry is an absolute method and thus no titer determination is necessary.Coulometric titrations are carried out easily and quickly with the 851 Titrando.Recommended measuring range: 10 µg - 200 mg absolute water.For use with OMNIS Software, tiamo software, or Touch Control unit. Compliance with GMP/GLP and FDA regulations such as 21 CFR Part 11, if required.

852 Titrando with generator electrode with diaphragm

852 Titrando with generator electrode with diaphragm

2.852.0050

Coulometer including generator electrode with diaphragm, 801 Magnetic Stirrer, and complete volumetric titration cell.Coulometry is the ideal method for water content determination in liquids, solids, and gases when it comes to water content determination in the trace range (10 µg to 10 mg absolute water). In addition, coulometry is an absolute method and thus no titer determination is necessary.Recommended coulometry measuring range: 10 µg - 200 mg absolute waterThe 852 Titrando controls not only coulometric, but also volumetric Karl Fischer titration.For use with OMNIS Software, tiamo software, or Touch Control unit. Compliance with GMP/GLP and FDA regulations such as 21 CFR Part 11, if required.

852 Titrando with generator electrode without diaphragm

852 Titrando with generator electrode without diaphragm

2.852.0150

Coulometer including generator electrode without diaphragm and complete volumetric titration cellCoulometry is the ideal method for water content determination in liquids, solids, and gases when it comes to water content determination in the trace range (10 µg to 10 mg absolute water). In addition, coulometry is an absolute method and thus no titer determination is necessary.Recommended coulometry measuring range: 10 µg - 200 mg absolute water.The 852 Titrando controls not only coulometric, but also volumetric Karl Fischer titration.For use with OMNIS Software, tiamo software, or Touch Control unit. Compliance with GMP/GLP and FDA regulations such as 21 CFR Part 11, if required.

Automated coulometric KF titrations

Automated coulometric KF titrations

MATi 04

MATi 4 is a fully automated system for coulometric KF titrations with high sample throughput. Up to 160 samples in 6 mL vials can be placed on the sample rack of the Sample Processor. The sample is pipetted into an external coulometric cell and then titrated there. The system is controlled with the OMNIS software.

917 Coulometer with generator electrode with diaphragm

917 Coulometer with generator electrode with diaphragm

2.917.0010

The 917 Coulometer is a compact titrator for coulometric water determination in accordance with Karl Fischer. ''Reduced to the max'' – operating module, stirrer and pump are integrated in the 917 Coulometer for rapid reagent replacement. This saves a great deal of space on the laboratory table.Recommended measuring range: 10 µg…200 mg absolute waterCoulometry is the ideal method for water content determination in liquids, solids and gases in the trace range. In addition, coulometry is an absolute method and thus no titer determination is necessary.The 917 Coulometer now also fulfills FDA Regulation 21 CFR, Part 11. This means you are always on the safe side when it comes to audits.

917 Coulometer with generator electrode without diaphragm

917 Coulometer with generator electrode without diaphragm

2.917.0110

The 917 Coulometer is a compact titrator for coulometric water determination in accordance with Karl Fischer. ''Reduced to the max'' – operating module, stirrer and pump are integrated in the 917 Coulometer for rapid reagent replacement. This saves a great deal of space on the laboratory table.Recommended measuring range: 10 µg…200 mg absolute waterCoulometry is the ideal method for water content determination in liquids, solids and gases in the trace range. In addition, coulometry is an absolute method and thus no titer determination is necessary.The 917 Coulometer now also fulfills FDA Regulation 21 CFR, Part 11. This means you are always on the safe side when it comes to audits.

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Video

See the OMNIS Coulometer in action

2020/10/12/kft-oven-method/_1
Blogg

Difficult samples? Learn more about the oven method!

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Blogg

Learn more about Karl Fischer titration in our FAQ blog series

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Applikation

Coulometric water content determination according to Karl Fischer

874 USB Oven Sample Processor, 852 Titrando (coulometric cell) and notebook with PC Control screen
Applikation

Automatic Karl Fischer water content determination with the 874 Oven Sample Processor

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Hitta applikationer för KF-titreringar

Coulometric Karl Fischer titrator – FAQs

What is coulometric Karl Fischer titration?

Coulometric titration is used to determine trace-levels of water in samples within a range of 10 µg to 200 mg water. However, larger amount of water (> 10 mg) require a lot of time and/or may exceed the water capacity of the KF reagent, which could lead to incorrect results.

The coulometric method uses electric current to generate the iodine that is needed for the Karl Fischer reaction. Metrohm KF Coulometers apply variable current strengths and pulse lengths, which allows precise "iodine addition" even in the region of the endpoint.

Learn more about coulometric KF titration in the application bulletin:

Coulometric water content determination according to Karl Fischer (AB-137, PDF, 228 KB)

Why is coulometric Karl Fischer titration used for water content determination?

Coulometric KF titration is a sensitive method suitable to determine low water contents between 0.001 and 1%. The coulometric method is an absolute method, meaning that there is no need for titer determination. In addition, a series of standards recommend coulometric Karl Fischer titration for water content determination:

Standard Name
ASTM D890 Standard Test Method for Water in Liquid Pine Chemicals
ASTM D1123 Standard Test Method for Water in Engine Coolant Concentrate by the KF Reagent Method
ASTM D1533 Standard Test Method for Water in Insulating Liquids by Coulometric KF Titration
ASTM D3401 Standard Test Methods for Water in Halogenated Organic Solvents and Their Mixtures
ASTM D4928 Standard Test Method for Water in Crude Oils by Coulometric Karl Fischer Titration
ASTM D5460 Standard Test Method for Rubber Compounding Materials - Water in Rubber Additives
ASTM D6304 Standard Test Method for Determination of Water in Petroleum Products, Lubricating Oils, and Additives by Coulometric KF Titration
ASTM D7923 Standard Test Method for Water in Ethanol and Hydrocarbon Blends by Karl Fischer Titration
ASTM E1064 Standard Test Method for Water in Organic Liquids by Coulometric Karl Fischer Titratio
DIN EN ISO 12937 Petroleum products - Determination of water - Coulometric KF titration method
ISO 10337 Crude Petroleum - Determination of water - Coulometric KF titration method
UOP 481-10 Water in Liquid Hydrocarbons, and Heavy Hydrocarbons by Vaporizer, using Coulometric Titration
USP <921> Method 1c
EP 2.5.32 Water: Micro Determination

What is the difference between coulometric and volumetric titration?

The main difference between coulometric and volumetric Karl Fischer titration concerns titrant addition. In volumetric Karl Fischer titration, the titrant is added directly to the sample with a buret. Coulometric Karl Fischer titration features a generator electrode, which electrochemically generates the required iodine for the titration directly in the titration cell.

Metrohm offers titrator solutions that perform volumetric or coulometric titration on separate titrators as well as both volumetric and coulometric titration in a single instrument. Contact us to learn more.

What are the requirements for coulometric titration?

Requirements for coulometric titrations are the following:

  • The process must take place with 100% current efficiency.
  • No side reactions must occur.
  • Oxidation or reduction must lead to a defined oxidation state.

Metrohm KF Coulometers meet these requirements with commercially available reagents.

Upptäck KF-titratorer från Metron
Omnis KF-titreringHelt igenom integrerad lösning för vattenhaltsbestämning med volymetrisk och coulometrisk Karl Fischer-titrering.
KF TitrandoVolymetrisk och coulometrisk Karl Fischer-titrator för noggrann bestämning av vilken vattenhalt som helst, från 0,001 till 100 %.
KF Ti-TouchKompakt allt-i-ett volymetrisk eller coulometrisk Karl Fischer-titrator för rutinmässig vattenbestämning.
Eco KF TitratorHög kvalitet, lågt pris: tillverkad i Schweiz, prisvärd lösning för rutinmässig volymetrisk Karl Fischer-titrering.
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