Do you have a video like this for the C30S Karl Fisher titrator ? can you explain how to prepare the reference solution? any possibility for subtitles?
Hi, Thank you for your feedback. Here is a playlist of a complete set of tutorials for a Coulometric KF Titrator (Like the C30S): ruclips.net/video/DMN4zzSgREY/видео.html. With the new RUclips subtitle options we will look to update our older videos accordingly, thanks for your feedback.
In our lab we use KF T5 and have both method ( volumetric and coulometric). I wonder about volume of sample when we add in chamber. The results are different when add one drop and one injection. Do you have a range of volume for the reaction? Or any recommendations.
Dear Littledeer Kwang, The amount of sample used depends on: • the expected water content, and the • required accuracy and precision. For volumetric titrations, the optimum amount of water is approximately 10 mg per sample. As a rule of thumb, the accuracy increases with the amount of sample, because the absorption of air moisture during sampling and sample addition becomes less important. If a high level of accuracy is required, the amount of sample should require a titrant consumption between 30 and 70% of the nominal burette volume. This corresponds to 7.5 to 17.5 mg water per sample for a 5 mL burette with a titrant concentration of 5 mg/mL. Water content determinations below 1000 ppm are not required to be quite as accurate: a relative standard deviation srel of 1 to 5% is generally considered as acceptable for such values. A titrant consumption of 0.1 to 0.05 mL is thus still acceptable when using a 5 mL burette. This corresponds to 0.1 to 0.05 mg water per sample with a titrant concentration of 1 mg/mL. For coulometric analyses, the optimum amount of water is in the range from 0.5 to 2 mg water per sample. Repeatable results can be obtained even with 0.1 mg water per sample. Under optimum measurement conditions, approx. 10-50 μg water can be detected if the demand for repeatability is not too high. In general, the accuracy is improved if larger sample amounts are used, because the absorption of atmospheric moisture during sampling or sample addition becomes less important. In your METTLER TOLEDO titrator, after you start a method, clicking on the ""More"" button you will find a useful ""Sample Size calculator"": you just have to insert the expected water content (in ppm or %) and the instrument will give you the ideal weight range. You can also find more information (including tables with reccomended weight ranges) in the KF guide n3 (Taking samples) following this link: www.mt.com/us/en/home/library/collections/laboratory-division/karl-fischer-titration-guides.html
Do you have a video like this for the C30S Karl Fisher titrator ? can you explain how to prepare the reference solution? any possibility for subtitles?
Hi,
Thank you for your feedback. Here is a playlist of a complete set of tutorials for a Coulometric KF Titrator (Like the C30S): ruclips.net/video/DMN4zzSgREY/видео.html. With the new RUclips subtitle options we will look to update our older videos accordingly, thanks for your feedback.
In our lab we use KF T5 and have both method ( volumetric and coulometric). I wonder about volume of sample when we add in chamber. The results are different when add one drop and one injection. Do you have a range of volume for the reaction? Or any recommendations.
Dear Littledeer Kwang, The amount of sample used depends on:
• the expected water content, and the
• required accuracy and precision.
For volumetric titrations, the optimum amount of water is approximately 10 mg per sample. As a rule of thumb, the accuracy increases with the amount of sample, because the absorption of air moisture during sampling and sample addition becomes less important.
If a high level of accuracy is required, the amount of sample should require a titrant consumption between 30 and 70% of the nominal burette volume. This corresponds to 7.5 to 17.5 mg water per sample for a 5 mL burette with a titrant concentration of 5 mg/mL.
Water content determinations below 1000 ppm are not required to be quite as accurate: a relative standard deviation srel of 1 to 5% is generally considered as acceptable for such values. A titrant consumption of 0.1 to 0.05 mL is thus still acceptable when using a 5 mL burette. This corresponds to 0.1 to 0.05 mg water per sample with a titrant concentration of 1 mg/mL.
For coulometric analyses, the optimum amount of water is in the range from 0.5 to 2 mg water per sample. Repeatable results can be obtained even with 0.1 mg water per sample. Under optimum measurement conditions, approx. 10-50 μg water can be detected if the demand for repeatability is not too high.
In general, the accuracy is improved if larger sample amounts are used, because the absorption of atmospheric moisture during sampling or sample addition becomes less important. In your METTLER TOLEDO titrator, after you start a method, clicking on the ""More"" button you will find a useful ""Sample Size calculator"": you just have to insert the expected water content (in ppm or %) and the instrument will give you the ideal weight range. You can also find more information (including tables with reccomended weight ranges) in the KF guide n3 (Taking samples) following this link: www.mt.com/us/en/home/library/collections/laboratory-division/karl-fischer-titration-guides.html
Which is the best karl fisher titrator and also tell the price
Hi,
Please contact your local sales office to find which METTLER TOLEDO titration system to best suit your application needs: www.mt.com/contact.
Sir mere yaha Mettler Toledo hi hai aur iska calibration aaj ke date me mujhe hi karna hai kaise kare plz help me
Thank you for your message, please ask a local representative. Contact details can be found at www.mt.com under "Contact Us