A calibrated pipette is required for the test head

(1) Accuracy: The n suction heads respectively absorb a quantitative amount of pure water to weigh, and the relationship between weight and volume is converted according to 1 g/mL.

(2) Air tightness: Take n suction heads, absorb the ink containing 1% glycerin of the range, observe that the colored liquid does not appear on the filter plug, and the liquid level is the same.

(3) Anti-aerosol performance: Take n suction heads, absorb positive nucleic acid, blow and suck repeatedly 10 times, change another new suction head to blow and suck repeatedly 10 times in negative pure water, take negative pure water as a template for amplification, no qPCR amplification is qualified.