In chemical production, how to take samples in small quantities, with precision, and without any unwanted odors

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This post was last edited by Rubber Vulcanization Accelerator on 2016-4-29 at 14:52. Are there any good methods for taking samples from reaction pipes during the production process? We only need a very small amount for sampling (a drop is enough), and then we can test it with a pH strip! Currently, sampling is done using valves and small containers; this results in a larger amount of sample being collected, as well as a stronger odor from the solvent. The sampled solution cannot be returned to the reaction system. Has anyone come across spot sampling? It’s fast and convenient. What I’m thinking now is to insert a metal rod with grooves into the pipe, ensuring proper sealing and positioning; each time it’s pulled out, a small amount of liquid will remain in the grooves, and after testing it can be pushed back into the pipe. Let’s see if it’s feasible Or help optimize it! The CN104390022A patent introduces one that some of you may have used!