What is the sample size for lead and copper analysis?

The correct sample size for lead and copper analysis is 1,000 mL. This standard volume is recommended because it ensures that the sample collected is sufficient for accurate and reliable testing. A larger volume can help to dilute potential interferences and provide enough sample material for various analytical methods, such as inductively coupled plasma mass spectrometry (ICP-MS) or other techniques sensitive to trace levels of these metals.

Using a smaller volume, such as 250 mL or 500 mL, may not capture enough of the lead and copper content in the water, potentially leading to inaccurate results. On the other hand, while a larger sample of 2,000 mL could provide more material, it may also be impractical for routine sampling and analysis in typical water systems. Thus, 1,000 mL strikes an ideal balance, ensuring that the analysis is reliable while remaining manageable for operators.