How do you perform a flame test?

When conducting a flame test, the following steps can be followed:

1. Prepare experimental materials: prepare materials or samples for flame testing as required. Ensure samples are dry, pure and properly loaded or placed in test tubes, refractory dishes, etc.

2. Set up the experimental environment: Secure the laboratory or test area and provide a well-ventilated environment to dissipate combustion products. Remove flammable items and keep fire sources and experimental items a safe distance from other objects.

3. Ignition: Use a Bunsen burner or alcohol lamp to light the flame. Adjust burner or lamp gas flow or alcohol flame size as needed for proper flame temperature and stability.

4. Adjust the position of the sample: place the substance or sample to be tested, such as a test tube, a refractory dish, etc., above the flame or in the center of the flame so that it is directly affected by the flame.

5. Observe the flame color: Observe the color and characteristics of the flame. Visual observations can be used during testing, as well as lights or filters to change or enhance the color of the flame. Take note of the colors observed and any observations made.

6. Result recording: During the test, record the observation results. Test results can be described and archived using images, text or other recording methods.

It is important to note that flame testing requires care and adherence to laboratory safety regulations. To ensure safe operation, remain vigilant at all times and use protective equipment such as safety glasses and lab gloves to avoid flame burns or other injuries.