When the specimen is immersed in ethanol, methanol, isopropanol, cyclohexane, acetone, water, 5% sodium chloride and 5% sodium sulfate for one week, it is dried and ground into powder for NAD testing.
When the test piece is soaked in ethanol, methanol, isopropyl alcohol, cyclohexane, acetone, water, 5% sodium chloride and 5% sodium sulfate after one week of drying ground powder for NAD testing,
When the specimens were immersed in ethanol, methanol, isopropanol, cyclohexane, acetone, water, 5% sodium chloride and 5% sodium sulfate for one week, they were dried and ground into powder for nad test,<br>