What material can be used as an alternate surface for reducing samples in Method B?

In Method B for reducing samples, the use of a canvas blanket serves as an effective alternate surface due to its properties that facilitate even distribution of sample material while maintaining the integrity of the sample. Canvas is strong and durable, providing a flat and stable surface that helps prevent the sample from being contaminated or compromised. This material also allows for easier handling and movement of the sample during the reduction process.

Other materials, while they may have certain advantages, can introduce challenges. For example, a plastic tarp might not provide the same grip and could lead to the sample moving or rolling, making it harder to manage. Metal sheets can be heavy and may not capture finer particles effectively, which could result in loss of material or uneven reduction. Wooden boards, while stable, may not be as clean or easily sanitized as canvas, potentially leading to contamination from previous samples or coatings on the wood.

Therefore, a canvas blanket is the preferred choice for ensuring a reliable and efficient sample reduction process in Method B.