Which of the following items is suitable for sterilization by dry heat (hot air oven)? (Select the material that tolerates high temperature without moisture.)

Introduction:
Dry heat sterilization (e.g., 160–170 °C for 2 hours) is ideal for moisture-sensitive, heat-stable items such as glassware and metal instruments. This question asks you to pick the appropriate item.

Given Data / Assumptions:

• Dry heat destroys by oxidative processes and requires higher temperatures and longer times than steam.
• Liquids and many plastics are unsuitable for dry heat.
• Glass tolerates high temperatures without deformation.

Concept / Approach:
Match the sterilization method to material tolerance. Glass pipettes withstand hot air oven temperatures, achieving sterility without moisture. Fluids and many polymers are better processed by moist heat or low-temperature gas methods.

Step-by-Step Solution:
Eliminate liquids (IV solution) that would evaporate/overheat in dry heat. Eliminate heat-sensitive plastics and rubber (IV bags, gloves). Identify glass pipettes as hot-air-compatible. Select “Glass pipettes.”

Verification / Alternative check:
Lab SOPs routinely sterilize glassware by hot air ovens; liquids are autoclaved by moist heat instead.

Why Other Options Are Wrong:

• IV solution / Plastic IV bags: Use moist heat or aseptic manufacture; dry heat is unsuitable.
• Rubber gloves: Typically sterilized by EtO or gamma; dry heat degrades elastomers.

Common Pitfalls:
Assuming any heat method works for all items; material compatibility is crucial.

Final Answer:
Glass pipettes are appropriate for dry heat sterilization.