Flocked Swab Evaluation: Virus Sampling Swab Material and Performance
Flocked swabs are the main test samples for PCR.
In the selection of raw materials, flocking glue plays a key role in the collection and release efficiency of swabs.
Whether to use high-quality water-based flocking glue is the main factor affecting the water absorption and hydrophilicity of fluff.
The experiment is to compare the sample collection effects of swabs flocked with different glues.
■ Preparation materials: Flocked swab, control group flocking swab, beaker, dye, water, balance, scale, vernier calliper.
1. The purpose of the experiment
The quality of incoming nasal swabs is guaranteed through the appearance inspection, size inspection and saturated liquid absorption inspection of the anterior nasal swab.
Flocked nasal swab
2 Sampling guidelines for flocked swab samples
2.1 Appearance inspection, the quality department conducts sampling according to scientific methods.
The quality personnel shall check whether the swab packaging bag is complete.
2.2 Visual inspection
1. Visually inspect the appearance of the swab to see that there is no lack of glue, no cracks, no deformation, no black spots and heterochromatic spots; (CR)
2. Visual inspection of the head: no damage, false soldering, missing soldering, black spots, looseness, dirt, scorch.
Visual inspection of the material: Compared with the swab sample, whether there is a difference in the material and thickness of the cotton tip of the swab.
2.3 Size check
The inspector carries out dimensional inspection according to the specifications of the material coding system.
2.4 Saturated suction volume
The inspector weighed the flocking cotton swab and recorded it as ml. Transfer it to a qualified preservation solution bottle 15 times. Weigh the swab again and record it as m2 and 0.11g ≤ m2-m1 ≤ 0.18g.
Remarks:
1. Definition of defect level: (MA) is a general defect mark; (MI) is a minor defect mark; (CR) is a serious defect mark.