NH4 flame test system is a common test method for detecting ammonia salt. The following are the general procedures for operating the NH4 flame test system:
1. Safe operation: Ensure that the safe operation procedures of the laboratory are known and followed before any chemical experiments are carried out. Wear laboratory safety supplies, such as laboratory gloves and goggles.
2. Sample Preparation: Prepare the sample to be tested. This may be a liquid sample, such as an aqueous solution or a soil extract, or a solid sample, such as a solid fertilizer or soil.
3. Prepare reagents and equipment: Prepare the required reagents and equipment. NH4 flame test systems typically require the use of sodium hydroxide (NaOH) and copper chloride (CuCl2) solutions, and a blowtorch or Bunsen burner that controls the size of the flame.
4. Test process: Inject the sample to be tested into an appropriate test tube or reaction vessel. Add certain amounts of NaOH and CuCl2 solution, the amount and order of addition according to the experimental method.
5. heat reaction: that tube or reaction vessel is heated, usually use a blowtorch or Bunsen burner. The sample is heated using a flame until a noticeable color change or flame reaction occurs.
6. Observations: Observe the sample for any changes during heating. The NH4 flame test usually results in the production of a specific colour, such as orange or red, indicating the presence of ammonia salts in the sample.
7. Interpretation of results: According to the experimental method or reference, compare the observed color with the standard, and judge the content of ammonia salt in the sample.
Please note that this is only a general procedure and may vary depending on the experimental method, equipment and reagents used. Always follow laboratory safety procedures when performing flame tests and refer to specific test methods or guidelines for more detailed instructions.