There are a variety of common problems that may be encountered during the use of COD digestion instruments.
Slow or inability to heat up: This can be due to a faulty heater or poor contact with the power supply. The solution is to check that the connection wire of the heater is secure and that the heater is working properly. If there is a problem, the heater can be replaced or the power connection repaired.
Incomplete digestion of the sample: This may be due to insufficient digestion time or insufficient digestion temperature. Depending on the sample type and concentration, the digestion time can be extended or the digestion temperature can be increased. At the same time, ensure that the sample is well sealed during digestion.
Abnormal sample measurements: This may be due to inaccurate reagent concentration, instrument failure, or improper sample handling. The solution is to check if the reagents are expired or contaminated and that the instrument is working properly. Reprocess the sample and take measurements according to the protocol. If the problem persists, the reagent may need to be replaced or the instrument repaired.
Instrument readings are erratic: This can be due to improper instrument calibration, environmental interference, or sample interference. The solution is to calibrate the instrument regularly to ensure that it is in optimal working order. At the same time, ensure that the laboratory environment is quiet and free from strong light and magnetic field interference. If the sample has an effect on the reading, try diluting the sample before taking the measurement.
Instrument Failure Alarm: This can be caused by damage to the instrument's internal parts, insufficient reagents, or operating errors. The solution is to check whether the internal parts of the instrument are damaged and whether the reagents are sufficient according to the alarm prompt. Parts can be replaced or reagents added if needed. At the same time, check whether the operation steps are correct, and refer to the operation manual if necessary.
Poor digestion effect: It may be caused by insufficient digestion reagent, low digestion temperature, insufficient digestion time, too many samples, etc. The solution includes adding sufficient digestion reagent, increasing the digestion temperature, extending the digestion time, and digesting the sample in batches.
Incomplete reagent**: It may be caused by contamination of the dilution reagent, changes in the composition of the digestion reagent, incorrect preparation of the reagent, etc. Solutions include using pure dilution reagents, changing digestion reagents in a timely manner, and preparing reagents in strict accordance with the preparation requirements.
When you encounter the above problems, you can take corresponding measures to solve them. At the same time, in order to ensure the accuracy and reliability of the measurement results, the operator should be familiar with the common faults and solutions, and strictly follow the operating procedures. When encountering a problem, you should calmly analyze the cause and take appropriate measures to solve it.