Should the entire sample be transferred to the 200# sieve for proper washing?

Should the entire sample be transferred to the 200# sieve for proper washing?

• A. True
• B. False
• C. Only if required by size
• D. Only for dry samples

Answer: (B)

The assertion that the entire sample should not be transferred to the 200# sieve for proper washing is accurate. In many laboratory protocols, especially those concerning particle size analysis or sedimentation, the use of a specific sieve is determined by the desired analysis size range, alongside the characteristics of the sample. Typically, the purpose of using a 200# sieve, which has a mesh size of 75 micrometers, is to retain particles larger than that size while allowing smaller particles to pass through. Transferring the entire sample to the 200# sieve can lead to unnecessary contamination of finer particles that may not be relevant to the intended analysis. Instead, it is common practice to wash only particles of a specific size range that are of interest, allowing researchers to focus on meaningful data aggregation without compromising the integrity of finer particles. Thus, not all samples need to be processed through this specific sieve. This tailored approach minimizes sample loss and targets the analysis requirements effectively.

The assertion that the entire sample should not be transferred to the 200# sieve for proper washing is accurate. In many laboratory protocols, especially those concerning particle size analysis or sedimentation, the use of a specific sieve is determined by the desired analysis size range, alongside the characteristics of the sample.

Typically, the purpose of using a 200# sieve, which has a mesh size of 75 micrometers, is to retain particles larger than that size while allowing smaller particles to pass through. Transferring the entire sample to the 200# sieve can lead to unnecessary contamination of finer particles that may not be relevant to the intended analysis. Instead, it is common practice to wash only particles of a specific size range that are of interest, allowing researchers to focus on meaningful data aggregation without compromising the integrity of finer particles.

Thus, not all samples need to be processed through this specific sieve. This tailored approach minimizes sample loss and targets the analysis requirements effectively.