Which step in automation generally remains manual in most laboratories?

Which step in automation generally remains manual in most laboratories?

• A. Preparation of the sample
• B. Specimen measurement and delivery
• C. Reagent delivery
• D. Chemical reaction phase

Answer: (A)

The main idea is that automation shines in moving samples through analysis once they’re ready, but the most variable and safety-sensitive part is getting the sample ready for testing. Preparing the sample involves tasks like extracting or concentrating the analyte, removing interfering substances, diluting or aliquoting, and ensuring the specimen is compatible with the analytical instrument. Each specimen type can differ greatly, and decisions about cleanup, matrix effects, and safety handling often require human judgment and hands-on procedures. Because of this variability and the need for careful, case-by-case handling, sample preparation remains largely a manual step in many labs. In contrast, once the sample is prepared, automation can typically handle measuring and routing the specimen (auto-samplers and delivery systems), delivering reagents, and carrying out the chemical reactions inside analyzers under programmed conditions. Those steps are more routine and can be standardized across many samples, which is why they are more readily automated. So, among the common stages, sample preparation is the one that generally stays manual.

The main idea is that automation shines in moving samples through analysis once they’re ready, but the most variable and safety-sensitive part is getting the sample ready for testing. Preparing the sample involves tasks like extracting or concentrating the analyte, removing interfering substances, diluting or aliquoting, and ensuring the specimen is compatible with the analytical instrument. Each specimen type can differ greatly, and decisions about cleanup, matrix effects, and safety handling often require human judgment and hands-on procedures. Because of this variability and the need for careful, case-by-case handling, sample preparation remains largely a manual step in many labs.

In contrast, once the sample is prepared, automation can typically handle measuring and routing the specimen (auto-samplers and delivery systems), delivering reagents, and carrying out the chemical reactions inside analyzers under programmed conditions. Those steps are more routine and can be standardized across many samples, which is why they are more readily automated. So, among the common stages, sample preparation is the one that generally stays manual.