The portable imported anthocyanin chlorophyll analyzer is a professional equipment used for rapid and non-destructive detection of anthocyanin and chlorophyll content in plant leaves, widely used in agriculture, forestry, horticulture, and scientific research fields. The measurement method is based on optical principles, calculating pigment content by measuring the absorption or reflection characteristics of specific wavelengths of light by the leaves. The following are typical measurement steps and precautions:
1、 Measurement principle
Chlorophyll determination:
Chlorophyll (such as chlorophyll a and b) has strong absorption peaks in the red light (660-680nm) and near-infrared regions. The instrument measures the transmitted or reflected light intensity of the leaves at these wavelengths and calculates the chlorophyll content (unit: mg/g or SPAD value) using algorithms.
Anthocyanin determination:
Anthocyanins have characteristic absorption peaks in the visible light band (such as 520-550nm, green light region). The instrument calculates the relative content of anthocyanins by analyzing the reflectance or absorption ratio of leaves in the green and red light regions.
2、 Measurement steps
1. Instrument preparation
Calibration: Perform blank calibration according to the instructions after turning on the device (usually using the calibration board or air calibration provided with the instrument).
Wavelength selection: Confirm that the instrument has pre-set the detection wavelengths for chlorophyll (such as 650nm, 940nm) and anthocyanin (such as 530nm, 650nm).
Battery check: Ensure sufficient power and avoid measurement interruptions.
2. Sample collection
Leaf selection: Select healthy and pest free mature leaves, avoiding leaf veins, edges, or damaged areas.
Cleaning treatment: Gently wipe the dust on the surface of the blade with a soft cloth or tissue, but avoid damaging the skin.
Temperature control: If the ambient temperature is too high or too low, the blades can be briefly left to equilibrate at room temperature before measurement.
3. Measurement operation
Clamp the blade: Place the blade flat into the measuring chamber of the instrument, ensuring complete coverage of the optical path window to avoid light leakage.
Start measurement: Press the measurement button, and the instrument will automatically emit light of a specific wavelength and receive reflected/transmitted signals.
Data reading: After waiting for a few seconds, the display screen shows chlorophyll content (such as SPAD value, Chlmg/g) and relative anthocyanin content (such as ACI index).
Repeated measurement: Conduct 3-5 measurements on different parts of the same blade or different blades, and take the average to improve accuracy.
4. Data recording and analysis
Direct reading: Some instruments can directly display the value of pigment content.
Export data: Transfer data to a computer via USB or Bluetooth, use accompanying software to analyze trends or generate reports.
Unit conversion: Convert SPAD values to chlorophyll concentration as needed (refer to instrument calibration curves or literature formulas).
3、 Precautions
Environmental interference:
Avoid direct sunlight on the leaves or instruments, and it is recommended to measure in a cool place.
Stay away from water sources or humid environments to prevent instrument damage.
Blade status:
Thick leaves (such as citrus) may require multiple measurements to take the average.
Leaves with thick wax layers (such as osmanthus) need to ensure complete penetration of the light path.
Instrument maintenance:
Regularly clean the light path window to avoid dust or stains affecting the measurement.
When not in use for a long time, remove the battery and store it in a dry and dark place.
Calibration cycle:
Re calibration is required after each battery replacement or prolonged use.
If the measurement results are abnormal, check the calibration status or contact the supplier.
4、 Application scenarios
Agriculture: Monitor crop nutritional status (such as nitrogen deficiency leading to a decrease in chlorophyll).
Horticulture: Evaluating the ornamental value of flowers (anthocyanin content affects flower color).
Research: Study plant stress response (such as pigment changes under drought and low temperature).
5、 Advantages and limitations
Advantages: Fast, non-destructive, portable, suitable for real-time detection in the field.
Limitations: Regular calibration is required, sensitive to leaf thickness and surface characteristics, and the results are relative values rather than absolute concentrations.
Through standardized operation and regular maintenance, the portable anthocyanin chlorophyll analyzer can provide users with an efficient and accurate solution for detecting plant pigments.