Rehmannia root detection

The selection of the Rehmannia detection method depends on the specific indicators to be detected, but it usually includes the following key steps and commonly used detection methods:

1. Sample collection and processing
Sample collection:
Based on the growth environment, harvesting time, and other factors of Rehmannia, select representative Rehmannia samples for collection.
Ensure that the number of samples collected is sufficient and can reflect the overall quality of Rehmannia.
Sample processing:
The collected Rehmannia samples are naturally dried, sliced, crushed, etc. for subsequent testing.
During the processing, it is necessary to ensure that the active ingredients of the samples are not lost to improve the accuracy of the test results.
2. Commonly used detection methods
Sensory detection:
Preliminary judgment is made by observing the sensory indicators such as the appearance, color, and texture of Rehmannia.
However, sensory detection is easily affected by subjective factors and cannot accurately reflect the inherent quality differences of Rehmannia.
High-performance liquid chromatography (HPLC):
High-performance liquid chromatography is a commonly used method for detecting the active ingredients of Rehmannia.
It can be used to detect the content of active ingredients such as catalpol, sugar compounds, and flavonoid compounds in Rehmannia.
This method has the advantages of high sensitivity, good separation effect, and good reproducibility.
Gas chromatography (GC): Gas chromatography is mainly used to detect pesticide residues in Rehmannia. By extracting the pesticide residues from Rehmannia samples and then performing gas chromatography analysis, the type and content of pesticides can be determined. Atomic absorption spectrometry (AAS): Atomic absorption spectrometry can be used to detect the heavy metal content in Rehmannia. This method can determine the content of heavy metal elements in Rehmannia samples by measuring the atomic absorption spectrum of heavy metal elements in Rehmannia samples. Other methods: Capillary electrophoresis, ultraviolet spectrophotometry, etc. are also included. These methods are also used in Rehmannia quality testing, but they may need to be selected according to specific testing indicators and laboratory conditions. 3. Test report and comprehensive evaluation Test report: Rehmannia test reports usually include basic information such as the source, batch, and collection date of the sample. List the items tested, such as active ingredient content, heavy metal content, pesticide residue, etc., and explain the test methods used. Record the test results of each indicator in detail and compare and analyze them with relevant standards. Comprehensive evaluation: Based on the test results, conduct a comprehensive evaluation of the quality of Rehmannia. Propose improvement suggestions or usage suggestions to provide a reliable basis for the production and use of Rehmannia.
IV. Precautions
Sample representativeness: Ensure that the collected samples are representative and can reflect the overall quality status of Rehmannia.
Detection method selection: Select the appropriate detection method according to the specific detection indicators and laboratory conditions.
Detection accuracy: The experimental conditions must be strictly controlled during the detection process to ensure the accuracy of the test results.
Data comparison and analysis: Compare and analyze the test results with relevant standards to evaluate the quality status of Rehmannia.
In summary, the selection of Rehmannia detection methods should comprehensively consider factors such as sample characteristics, detection indicators, and laboratory conditions. Through scientific detection methods, the quality status of Rehmannia can be accurately evaluated, providing a reliable basis for the production and use of Rehmannia.