Principle of salt content analyzer

The salt content analyzer operates on the principle of microcoulomb titration: the halides in crude oil are heated and extracted into water, and the chloride ions in the sample dissolve in this water. This solution containing chloride ions is then added directly to the titration cell. Electrolysis is used to generate silver ions, which react with the chloride ions. Once the reaction is complete, electrolysis to produce silver ions stops automatically. The computer then calculates the amount of chloride ions or salt content in the sample based on the amount of electricity consumed in generating those silver ions.

Reply to 2# kwang83: How often do you usually replace the electrodes? The manufacturer says that it generally needs to be replaced every three months to half a year, is that correct?

Reply to 3# zhaoyuejiang: I haven’t used it in practice either. From its working principle, it seems to measure based on the amount of silver that is electrolyzed; I guess the silver chloride on the electrodes needs to be replaced once it reaches a certain level ! ! ! ! ! ! They are just personal opinions; it’s best to consult a professional! ! ! ! ! !

I don’t know how it is with their manufacturer; in any case, I’ve never heard of such a claim from other manufacturers. There are also microcoulomb electrolyzers for chlorine production that use silver chloride as well; I’ve never heard of anything like that. Please consider it, OP

This post was last edited by zhaoyuejiang on 2010-11-19 09:55. Yesterday morning, I got in touch with that company to ask about the principle of the microcoulomb analyzer as well as the details regarding the electrodes (since the day before yesterday, one of our company’s technicians went there to carry out repairs; I was worried that they might not have understood the principle). They explained that the electrodes are coated not with silver chloride, but with sodium chloride, as well as magnesium chloride and calcium chloride, among others. Since the company on the other end was very impatient when I asked them questions about this matter, it was not possible to get detailed information, and I was quite dissatisfied. I doubt whether their electrodes are actually made of genuine silver and platinum; otherwise, why would they need to be replaced every three months? And it’s not possible to explain the issues raised to customers effectively. (I originally wanted to record the exact words from the phone call, but to avoid unnecessary hassle, I’ll skip that here. However, I’d like to remind everyone to be careful when dealing with Gaoke’s products in the future.) ）

Reply to 6# zhaoyuejiang: Bro, did you run into someone trying to scam you? ? The unit shouldn’t be like this; I’ll consult with engineers from other companies and call you back later. I despise such companies

Jiangyan Gaoke Analytical Instruments Co., Ltd., Jiangyan Economic Development Zone, Jiangsu Province. Contact person: Zhu Mingjun. Phone numbers: 0523-88899919 and 88811680. Fax: 0523-88811680. Mobile phone: (0)13852666680. This is from the manufacturer; please ask them about these matters

Hello, I just consulted an engineer from Jiangsu Jiangfen, and he confirmed that it is indeed necessary to replace the electrodes; the time required depends on the cleanliness of the samples and their frequency of use. Additionally, the electrodes are plated with silver chloride. Also, this can be electroplated by oneself; the manufacturer should provide the methods and conditions for plating.

Try not to touch the electrodes. Pay attention to the rotor’s speed, and definitely avoid using the wrong electrolyte

Our company is involved in measuring the salt content in crude oil; if there are any issues, we can discuss them together, as the principles are the same. Let’s first talk about how we use it. 1. Generally, an electrode can be used for about two to three months after being plated once, but I usually replace it as soon as I notice it turning white, because the quality of electroplating directly affects the peak formation speed and shape, which in turn influences the integration value. 2. We plate the electrodes ourselves, using a 10% sodium chloride solution as the plating solution. Only two electrodes need to be plated (made of silver rods; before each plating process, they are polished, rinsed with ultrapure water, and then dried with nitrogen). These are the measurement electrode and the anode. The plating process lasts for ten minutes, until a dark brown color is achieved. The references are usually provided by the manufacturer, and electroplating involves toxic substances as well as being complicated, so there is no need for it. The cathode is made of platinum wire, so it also does not require electroplating. It was found that using scalding hot water as a bath in the electroplating solution yields excellent results, with minimal silver exposure. We can discuss other matters depending on the specific situation, and see what issues there are