Hydranal™ Reagents for Water Determination by Karl Fischer Titration.

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Hydranal is a line of titration reagents and standards designed for accurate water determination. If you work in an industry where it’s important to know the precise water content of your samples, Hydranal can help you achieve that accuracy. By using Hydranal products, you can streamline your titration process, improve the reproducibility of your results, and have confidence in the quality of your measurements. Hydranal can help you make informed decisions based on reliable data, which can ultimately save you time, money, and resources.

Original and Accurate Hydranal Karl Fischer Reagents

Leading the way in innovation and safety since 1979, Hydranal reagents for Karl Fischer (KF) titration have been recognized as the most trusted brand in the industry.

The Hydranal portfolio is made up of methanol and ethanol-based KF reagents free from pyridine. Reagents for volumetric and coulometric application are completed by a wide range of standards and auxiliaries.

 

 

Advantages of HYDRANAL Reagents:

• High titration speed
• Stable end points
• Accurate results
• Long shelf life
• Wide applicability
• World leading technical support

HYDRANAL-Composite

Hydranal-Composite is the world‘s most frequently used pyridine-free Karl Fischer reagent. This one-component reagent has been proving its capabilities in volumetric titration for more than thirty five years in a large range of applications in the most diverse fields of research and industry. Ongoing development work has achieved significant improvements to this reagent.

Advantages of HYDRANAL One-Component Reagents:

• Unlimited water capacity
• Convenient and easy to use
• The greatest flexibility in working media selection
• Suitable for methanol-reacting compounds, e.g. ketones and aldehydes
• Long shelf life (three years)

HYDRANAL-Water Standards

Quality management plays an important role in Karl Fischer titration. Calibration, validation and inspection of analytical instruments and reagents is performed with a specific amount of water, either pure water or water standards. The challenge with pure water is the low amount required (10-50 mg for volumetry, and 0.1-1 mg for coulometry), which is difficult to handle and weigh.

Advantages of HYDRANAL-Water Standards:

• Broad product range for volumetric and coulometric Karl Fischer applications
• Manufactured according to current ISO requirements
• Tested against NIST SRM 2890
• Long shelf life (up to five years)
• Convenient packaging
• Supplied with detailed instruction for use
• Report of Analysis showing the exact water content is included

If you are looking to improve your Karl Fischer titration performance, the team of Hydranal experts can support you with:

• Selecting the most suitable Karl Fischer reagents for your samples
• Recommending application methods
• Troubleshooting technical problems (solubility, side reactions, etc.)
• Technical Karl Fischer seminars and trainings
• Comprehensive literature

Get in touch with us to discuss your requirements and see how Hydranal products can help you.

Save 10% off Hydranal list prices until 30/06/23.

Titration made easy

Total Lab Supplies offers a range of Titration solutions.

Titration is is a common laboratory method of quantitative chemical analysis to determine the concentration of an identified analyte (a substance to be analysed). A reagent, called the titrant or titrator, is prepared as a standard solution of known concentration and volume. The titrant reacts with a solution of analyte (which may also be called the titrand) to determine the analyte's concentration. The volume of titrant that reacted with the analyte is called the titration volume.

Total Lab Supplies supplies SI Analytics range of Titrators for all applications including Karl Fischer titration.

Karl Fischer titration is a classic titration method in chemical analysis that uses coulometric or volumetric titration to determine trace amounts of water in a sample. It was invented in 1935 by the German chemist Karl Fischer. Today, the titration is done with an automated Karl Fischer titrator.

You can’t go wrong with the new TitroLine® KF titrators from SI Analytics.

The TitroLine® 7500 KF is the volumetric generalist and the TitroLine® 7500 KF trace is the specialist for low water contents.  Both new titrators have the following features:-

• Fast, easy and precise
• With standard methods for different applications (titer, blank value, 1 or 2 component reagent)
• The addition of solvent and the extraction of the titrated sample are managed by the titration stand TM 235 KF (optional for TitroLine® 7500 KF trace
• Online display of curve and measurement drift during titration

We can also supply a FULL range of Hydranal® chemicals for use with all brands of Karl Fischer titrators.

Visit http://www.totallabsupplies.co.uk/?p=1730 for more information.

Today in Chemistry History – Emil Erlenmeyer’s Birthday

The Erlenmeyer flask is a piece of glassware most of us have likely used at some point. The tapered sides and narrow neck of this flask allow the contents of the flask to be mixed by swirling, without risk of spillage, making them suitable for titrations. By placing it under the buret and adding solvent and the indicator in Erlenmeyer flask. Such features similarly make the flask suitable for boiling liquids. Hot vapors condense on the upper section of the Erlenmeyer flask, reducing solvent loss. Erlenmeyer flasks' narrow necks can also support filter funnels.

As Compound Interest notes “The Erlenmeyer flask’s popularity lies in its utility. Its flat base means it isn’t easily toppled, unlike the round-bottomed flasks which can also be found in the laboratory. Its tapered, cone-like shape, coupled with its narrow neck, means that liquids inside it can be swirled without spilling easily. Additionally, the sides minimise loss of liquids from the flask when they are heated, as vapours condense on the sides. The narrow neck can also be plugged with a rubber or glass stopper.”

Who was Erlenmeyer?

Erlenmeyer was the son of Dr. Friedrich Erlenmeyer, a Protestant theologian. He enrolled in the University of Giessen to study medicine, but after attending lectures of Justus von Liebig changed to chemistry. In the summer of 1846 he went to Heidelberg for one year, and studied physics, botany and mineralogy, returning to Giessen in 1847. After serving as assistant to H. Will and then to Carl Remigius Fresenius, Erlenmeyer decided to devote himself to pharmaceutical chemistry. For this purpose he studied in Nassau, where he passed the state pharmaceutical examination, and shortly afterwards acquired an apothecary’s business, first at Katzenelnbogen and then in Wiesbaden. He became dissatisfied with pharmacy and returned to chemistry, finishing his doctorate at Giessen in 1850.

In 1855 he moved to Heidelberg and there converted a shed into a private laboratory. In 1857 he became privatdocent and his habilitation thesis "On the manufacture of the artificial manure known as superphosphate” contained a description of several crystalline substances which greatly interested Robert Bunsen. It was while at Heidelberg that Erlenmeyer was brought under the influence of August Kekulé, whose theoretical views he was one of the first to adopt. He was the first to suggest, in 1862, that double and triple bonds could form between carbon atoms, and he made other important contributions to the development of theories of molecular structure.

In 1863 he became associate professor at the University of Heidelberg. In 1868 he was hired as full professor in Munich to take charge of the laboratories of the new Munich Polytechnic School, a post which he held until his retirement from teaching in 1883.

His work mostly focused on theoretical chemistry, where he suggested the formula for naphthalene and formulated the Erlenmeyer rule: alcohols in which the hydroxyl group is attached directly to a double-bonded carbon atom become aldehydes or ketones.

Erlenmeyer’s practical investigations were concerned mostly with aliphatic compounds. In 1859 he synthesised aminohexoic acid and proceeded to study the general behaviour of albuminoids on hydrolysis. He worked out methods to determine the relative amounts of leucine and tyrosine, which are produced during the degradation of several substances of this class, and was the first (1860) to understand the nature of glycide and to suggest that this substance is related to glycerol in the same way as is metaphosphoric acid to orthophosphoric acid. In the following year he studied the action of hydroiodic acid on glycerol, and showed that the product was isopropyl- and not propyl iodide. His investigations of the higher alcohols produced during fermentation yielded the important proof that these alcohols do not belong to the normal series.

For more information visit:

http://www.compoundchem.com/2016/06/28/erlenmeyer/

https://en.wikipedia.org/wiki/Emil_Erlenmeyer

https://www.prlabs.co.uk/lab-supplies.php?N=erlenmeyer-flask-pp&Id=42994

Titration

Titration, also known as titrimetry, is a common laboratory method of quantitative chemical analysis that is used to determine the unknown concentration of an identified analyte. Since volume measurements play a key role in titration, it is also known as volumetric analysis. A reagent, called the titrant or titrator is prepared as a standard solution. A known concentration and volume of titrant reacts with a solution of analyte or titrand to determine concentration.

Titrator set up

 
The word "titration" comes from the Latin word titulus, meaning inscription or title. The French word titre, also from this origin, means rank.
 

There are several reasons why titration is used in laboratories worldwide:

1. Titration is an established analytical technique
2. It is fast
3. It is a very accurate and precise technique
4. A high degree of automation can be implemented
5. Titration offers a good price/performance ratio compared to more sophisticated techniques
6. It can be used by low-skilled and low-trained operators
7. No need for highly specialised chemical knowledge

Karl Fischer titration: A potentiometric method to analyse trace amounts of water in a substance. A sample is dissolved in methanol, and titrated with Karl Fischer reagent. The reagent contains iodine, which reacts proportionally with water. Thus, the water content can be determined by monitoring the potential of excess iodine.

 

Automated titrators follow a defined sequence of operations. This sequence is basically the same for all different models and brands. This sequence is performed and repeated several times until the endpoint or the equivalence point of the titration reaction is reached (titration cycle).

More complex applications require more steps, for example dispensing of an additional reagent for back titration, dilution of the sample, adjustment of the initial pH value, etc. These steps and the corresponding parameters are defined in the titration methods used by the titrator.


P&R Labpak offer a full range of titration equipment and associated consumables and chemicals such as Hydranal^® reagents.

For more information visit:-
http://en.wikipedia.org/wiki/Titration