What is the maximum relative humidity of a drying oven when drying SFRM density samples?

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Multiple Choice

What is the maximum relative humidity of a drying oven when drying SFRM density samples?

Controlling the oven environment is crucial so that the weight loss you measure truly reflects moisture removed from the sample, not moisture from the surrounding air. Keeping the oven’s relative humidity limited to 60% or less ensures the air is dry enough to promote evaporation at the drying temperature (about 110°C) and reduces the chance of moisture reabsorption or condensation on cooling. If humidity were higher, the drying would be less effective and results could vary between samples, hurting accuracy and reproducibility. Therefore, the maximum allowed relative humidity is 60%.

Controlling the oven environment is crucial so that the weight loss you measure truly reflects moisture removed from the sample, not moisture from the surrounding air. Keeping the oven’s relative humidity limited to 60% or less ensures the air is dry enough to promote evaporation at the drying temperature (about 110°C) and reduces the chance of moisture reabsorption or condensation on cooling. If humidity were higher, the drying would be less effective and results could vary between samples, hurting accuracy and reproducibility. Therefore, the maximum allowed relative humidity is 60%.

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