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Lost in random physical4/10/2023 ![]() This error is unavoidable, so the test result is often low or high. The method error refers to the error caused by the physical and chemical test analysis method itself. The main sources of system errors are the following: Such errors can be reduced and corrected by certain measures. The systematic error is mainly caused by the incorrect measurement method, the wrong method of using the instrument, the failure of the measuring instrument, the performance of the testing device itself, the improper use of the standard substance and the change of environmental conditions. ![]() The magnitude of the error value is either positive or negative, which is called the fixed system error, or When the measurement conditions change, the error changes exhibit a certain law, which is also called the variable system error. Systematic error refers to the repeated measurement of the same object under repeated measurement conditions. General error (also known as regular error) Instruments, equipment, laboratory environment, operating procedures, reagents, samples and other factors have seriously affected the quality of physical and chemical testing, resulting in many errors in physical and chemical testing. Then, what are the specific causes of each error? There are three main sources of error in physical and chemical laboratories: systematic error, random error and human error. Physical and chemical testing is one of the main testing parts of laboratory testing, and its testing results are the main scientific basis for determining product quality.
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