YY/T 1286.1-2015Platelets storage container performances - Part 1: Determination of gas permeability of the film—Differential-pressure method (English PDF)

2.1 Gas transmission rate gaspermeance

Partial pressure of the material on both sides of the unit, the amount of gas per unit time through unit area of the plastic material.

Note 1. The oxygen gas is used, the value obtained is the oxygen transmission rate (PO2).

Note 2. The amount of gas is through international units per square meter second molar pascal [mol/(m2 · s · Pa)]. In a standard atmospheric pressure, usually cc 24 hours per square meter standard atmospheric pressure [cm3/(m2 · 24h · atm)] as a unit. Conversions between them as follows.

1mol/(m2 · s · Pa) = 1.9621 × 10-16cm³/(m2 · d · atm).

Although the amount of gas through the unit in a standard atmospheric pressure (atm) is not SI units, but most reflect the actual sample at atmospheric pressure ventilation situation. Some test instrument used to 0.1MPa (1bar) approximation instead of a atmospheric pressure (1atm = 101325Pa) units. cubic centimeters per M² day 0.1 MPa [cm3/(m2 · d · 0.1MPa)]. Conversions between different units as follows.

1cm³/(m2 · 24h · atm) = 0.9869cm³/(m2 · d · 0.1MPa) = 0.9869cm³/(m2 · d · bar) = 9.869 x 10^-6cm³ / (M2 · d · Pa).

Principle 3 The gas sample is placed in the test chamber (see Fig. 1), so that the gas between the upper and lower chambers (high-pressure chamber and the low pressure chamber) is formed by A sealed barrier. On the low-pressure chamber is evacuated, and then the high pressure chamber immediately evacuated. Test gas is introduced into the evacuated high-pressure chamber, and through Sample enters the low pressure chamber. By measuring the low pressure chamber of the pressure increment measured by the amount of the test gas sample.

4.1 Sample Preparation

On the platelet storage bag and cut the appropriate sample size. Note that clipping the sample area can not be wrinkled, folded, or pinholes, and blood Small board storage bag without labeling area. It should be larger than the area of the test chamber through the gas area.

4.2 Number of specimens

Unless otherwise specified or determined by the interests of stakeholders consultation carried out three test specimens.

5.1 Overview

Figure 1 shows an example of determination of the amount of gas permeation instrument of pressure sensors. The instrument is designed for the sample gas through the gas-permeable