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Entre em contato com sua subsidiária local ou distribuidor exclusivo da Metrohm para obter suporte técnico.

Hi This very much depends on the accuracy of the result you want to achieve. For example, if the result is only a rough guide, it is fine to perform a calibration or replace the electrolyte before the pH measurement. However, if you want the result to be as accurate as possible, maintenance is more important and should be carried out at least monthly or even weekly. In general, frequent maintenance of the electrode is recommended for warranty reasons and also with regard to the lifetime of an electrode.

@@MetrohmTV Thanks a lot for your answer !

@@BenoitPlomb-u8l You're welcome. We hope this helps!

Hi Your local Metrohm subsidiary or exclusive distributor can help you with this! Have you been in touch with them?

Hi If you're talking about electrolytes, the electrode should always be filled with electrolyte up to the filling opening, regardless of the type of Metrohm pH electrode. You can find more information on this topic in the monograph 81085081EN "pH Measurement" under "Electrolyte" and "Electrolyte Outflow": www.metrohm.com/en/products/8/1085/81085081.html

We assume that you see a Cl peak in the blank. You could try increasing the rinsing volume. Or run several blanks in a row to see if the peak decreases. If yes, then increase the rinsing volume. If not, then it could be an impurity in the chemicals or the ultrapure water. Whenever possible, you should use chemicals and ultrapure water without impurities. Please also check our Product Help Center IC: www.metrohm.com/en/service/product-help-center/ion-chromatography.html

The tube needs to be replaced when it's contaminated or defective.

Hi Thank you for your comment. For instrument quotes, please contact your local Metrohm subsidiary or exclusive distributor: www.metrohm.com/en.html#country-selection Best regards Michel, Metrohm International Headquarters

Hi You can contact your local Metrohm organization or exclusive distributor through our website: www.metrohm.com/en.html#country-selection Best regards Michel, Metrohm International Headquarters

We would recommend calibrating the sensor daily and at the temperature of the samples for exact results. It depends a bit on the accuracy that is required.

Hi Thank you for your comment. If you would like to receive a quote for this instrument, please contact your local Metrohm subsidiary or exclusive distributor. You can contact them through our website: www.metrohm.com/en.html#country-selection BR Michel, Metrohm International Headquarters

Hi You can find our recommendation in the electrode manual on page 8: www.metrohm.com/content/dam/metrohm/shared/documents/fact-sheets/81098042EN.pdf BR Michel, Metrohm International Headquarters

That's great to hear, thank you! We're happy you like the instrument!

Great! We're happy you found this useful!

Thanks!

Hi Thank you for reaching out to us. In order to get accurate and comprehensive information on how to operate our IC systems, we recommend that you contact your local Metrohm subsidiary or exclusive distributor for support. Alternatively, you can also find information in the manual of your IC system. BR Michel, Metrohm International Headquarters

Hello, this does not affect the calibration. After cleaning, you need to prep the burette with fresh titrant and your system will be working correctly.

Hi Please find the contact details of Metrohm India here: www.metrohm.com/en_in/company/how-to-find-us.html

Hi Erick There could be various reasons for this. You can find additional information on this topic in our Application Bulletin AB-188: www.metrohm.com/en/applications/ab-application-bulletins/ab-188.html If you need to troubleshoot your instrument or sensor, please get in touch with your local Metrohm subsidiary or exclusive distributor: www.metrohm.com/en.html#country-selection BR Michel, Metrohm International Headquarters

Hi Thank you for your comment. Could you please check if another electrode can be calibrated? This way we would know if the problem lies with the instrument or the sensor. In general, if you require instrument support, please contact your local Metrohm organization or exclusive distributor. BR Michel, Metrohm International Headquarters

Hi Thank you for your comment. This problem could be due to a variety of reasons. Therefore, to get to the bottom of this, we recommend that you contact your local Metrohm organization or exclusive distributor. BR Michel, Metrohm International Headquarters

Hi Please get in touch with your local Metrohm subsidiary or exclusive distributor. They will gladly help you troubleshoot these issues: www.metrohm.com/en.html#country-selection BR Michel, Metrohm International Headquarters

Hi If you're looking for more information on electrode calibration, check out our Electrode Help Center: www.metrohm.com/en/service/product-help-center/electrodes/maintenance-and-care-of-electrodes.html If you're looking for instructions on the 827 pH lab, you can find the manual here: www.metrohm.com/content/dam/metrohm/shared/documents/manuals/88/88278001EN.pdf And if you need more support with your instrument, please contact your local Metrohm organization or exclusive distributor: www.metrohm.com/en.html#country-selection Best regards Michel, Metrohm International Headquarters

You're welcome!

Hi! Thank you for your comment. Your local Metrohm subsidiary or exclusive distributor can help you to configure your method. You can find the contact details on our website: www.metrohm.com/en.html#country-selection

Một loại thuốc không nhãn mác, không hạn sử dụng sẽ không được lưu hành và khuyên cáo người sử dụng không nên dùng. Xác định thành phần thuốc rất khó khăn, phải dùng đến các loại máy phân tích hiện đại độ chính xác cao và giá thành rất đắt. Vì thế sẽ rất ít các cơ quan nhận mẫu kiểm nghiệm trong trường hợp này!

Thank you 🙂

Hi @fatinrun A blocked piston on an exchange unit is usually caused by a blocked tube or anti diffusion tip. We suggest: - Remove the anti diff. tip and try dosing again - If the anti diff. tip doesn’t rectify the problem then remove the burette tip and dose again - If the blockage still occurs then disconnect the outlet tubing from the valve unit and try dosing - make sure you have tissue at hand to catch the dispensed liquid - If problem remains then the issue has to be caused by a blocked valve/stop cock which will need removing/rinsing and potentially replacing - If this doesn't fix the issue, please send an email to technical@metrohm.co.uk and we will be happy to assist further.

Hi Moisture content is definitely one important parameter for the quality assurance, but it is not the only one. Next to that, multiple key parameters, like ethanol, glycerol, or active ingredients like sodium laureth sulfate can be measured simultaneously in less then one minute using the DS2500 Solid Analyzer. The Vision Air software displays all parameters on one screen when the analysis is finished.

You should use distilled or ultrapure water for cleaning.

Hi Thank you for your question. No, the oven method is not mentioned in ASTM D1533. It describes direct coulometric Karl Fischer titration. The samples must be added directly into the titration cell.

You're welcome!

@@MetrohmTV I’ve been publishing on the power of field-able chemical analysis. I’ve been really impressed by what you’ve accomplished with your portable NearIR source.

Thank you, we appreciate it!🙏

Yes. More precisely, the charged ion exchange groups on the surface of the resin are responsible for the ion exchange.

Thanks! We're happy you like it. BTW: You can find more recorded webinars in our Webinar Center: www.metrohm.com/en/service/webinar-center.html

Hi If you're interested in our products and services, please contact our colleagues at Metrohm Brazil. www.metrohm.com/pt_br.html

Hi Samuel Thank you for your comment. You always have to calibrate with buffers which lie within your measuring range. With buffers pH 4, 7, and 9, you’re already covering quite a broad pH range. Should you need to cover an even broader range, you can use pH buffers from other manufacturers. As for the electrode: The electrode has to be dipped in in such a way that the diaphragm is fully covered by your measuring solution. I.e., the glass membrane and diaphragm have to be immersed but the electrolyte filling hole has to stay above the sample. Best regards Michel, Metrohm International Headquarters

@@MetrohmTV 😀 thanks for your reply 😊

Hi We cannot tell what the problem might be without further information. Please contact your local Metrohm subsidiary or exclusive distributor for technical support in this matter: www.metrohm.com/en.html#country-selection Best regards Michel, Metrohm International Headquarters

Hi We do have an application where we used the Optrode for turbidity titrations. However, turbidity titration does not work in every case. It depends on the difference of turbidity and on your sample. Therefore you would need to test it out for your specific application. Please find the application here: www.metrohm.com/en/applications/application-notes/aa-t-001-100/an-t-055.html If you need more support, feel free to contact your local Metrohm subsidiary or exclusive distributor: www.metrohm.com/en.html#country-selection Best regards Michel, Metrohm International Headquarters

Thank u for your kind rply. But in our case the end point is not capturing at the equivalnace point.(we are using optrode equiped with 905 titrando)

As mentioned in the last comment, the detection of the turbidity is dependent on your sample. Please get in touch with your local Metrohm Agency to resolve the issue: www.metrohm.com/en.html#country-selection Best regards Michel, Metrohm International Headquarters