Before using the scientific research version of the blast drying oven to process biological samples, the samples need to be carefully processed. Tissue samples should be cut into appropriate sizes to ensure even heating; liquid samples can be pre-concentrated or evenly spread on a suitable carrier. At the same time, the suitability of the drying oven drying method should be evaluated based on the characteristics of the sample. For example, for some heat-sensitive biological macromolecule samples, the drying temperature and duration need to be carefully selected to prevent structural damage and loss of activity.
Temperature has a significant impact on the drying effect of biological samples. For different biological samples, it is crucial to accurately set the drying temperature. Generally speaking, the conventional biological sample drying temperature can be set at 30°C - 60°C, which can not only promote water evaporation, but also retain the biological activity and structural integrity of the sample to the greatest extent. For samples with good heat resistance, such as certain plant seeds, the temperature can be increased appropriately to speed up the drying process, but close monitoring is required to prevent the samples from being damaged by overheating. During operation, the temperature parameters are finely adjusted with the help of the drying oven's high-precision temperature control system, combined with sample characteristics and previous experimental experience.
Humidity control is a key part of biological sample drying. The scientific research version of the blast drying oven uses blast to promote air flow to accelerate water evaporation, but the humidity changes in the oven need to be reasonably controlled. Some biological samples require drying in a low-humidity environment to inhibit microbial growth and sample deterioration. Some advanced scientific research versions of the blast drying oven have a humidity adjustment function, which can set the target humidity value according to sample requirements. If the equipment does not have this function, high-efficiency desiccants, such as silica gel, molecular sieves, etc., can be placed in the box and replaced regularly. , to maintain a low humidity environment in the box and promote rapid and stable drying of biological samples.
The blast system of the scientific research version of the blast drying oven provides forced air circulation for sample drying. Reasonable air flow distribution and circulation mode can ensure the uniformity of temperature and humidity in the box and improve drying efficiency and quality. When placing samples, avoid overly dense accumulation of samples and ensure smooth airflow through each sample. At the same time, according to the structural characteristics of the drying box and sample characteristics, the fan speed and wind direction settings are optimized so that the hot air acts on the biological samples evenly and stably, accelerating the diffusion and evaporation of water, and achieving efficient drying.
The length of drying time directly affects the drying effect and quality of biological samples. Determining the drying time requires comprehensive consideration of factors such as sample type, initial moisture content, temperature, humidity, and air flow. For biological samples that are being processed for the first time, it is recommended to conduct a preliminary experiment first, monitor changes in moisture content of the sample through regular weighing or other detection methods, draw a drying curve, and accurately determine the appropriate drying time range based on this. During the formal drying process, the time is strictly controlled to avoid under- or over-drying, ensuring that the sample reaches the ideal drying state, and providing a reliable sample basis for subsequent experimental research.
During the drying process of biological samples, it is crucial to prevent cross-contamination. Before and after using the drying box, the inner wall, shelves, fan blades and other parts of the drying box should be thoroughly cleaned and disinfected. Appropriate disinfection methods such as 75% alcohol and ultraviolet irradiation can be used. For biological samples from different sources or types, if conditions permit, they should be dried in batches and in separate areas, and well-sealed containers should be used to hold the samples to prevent mutual contamination between samples and cross-contamination between samples and the internal environment of the drying box, which is effective Protect the purity and integrity of samples and ensure the accuracy and reliability of experimental results.
Dried biological samples need to be properly handled and stored. After drying, samples should be promptly transferred to sterile, dry, and well-sealed storage containers, such as centrifuge tubes, sample bags, etc., and appropriate storage conditions should be selected based on sample characteristics, such as low-temperature refrigerators, liquid nitrogen tanks, etc. At the same time, record the information related to sample drying in detail, including sample name, source, drying parameters (temperature, humidity, time, air flow, etc.), weight after drying and storage location, etc., and establish a complete sample file management system to facilitate subsequent sample traceability and experiments. Data analysis and results publication provide strong support and guarantee for scientific research work.
