Abstract:
This study describes the stability of chemical and physical properties of single-use
polypropylene syringes under elevated temperature and relative humidity. 300 pieces of
syringes were kept in a controlled room for six months under temperature of 40°C and
relative humidity of 70%. Samples were analyzed to test the physiochemical properties
to determine the stability of those properties under conditions mentioned above also to
determine the shelf life of the syringes.
Chemical results, concentration of reduced substances in sample solutions for the six
months were: 0.2mL, 2.5 ml, 1.2 mL, 0.9 mL and 2.1 mL.
The average was concentration results theof reduced substances during the six months
were 1.66 ml.
Chemical results, alkalinity in samples solutions for the six months in a row were : 0.1
mL, 0.08 mL, 0.24 mL,0.19 mL and 0.16 mL.
The average of the alkaline properties results of the of samples solutions during the six
months were 0.16 mL.
The absorption results on the UV spectrophotometer of the samples in the range of 220
nm respectively were: 0.002, 0.077, 0.054, 0.046 and 0.159.
The concentration results of the absorbed substances on the UV spectrophotometer of
the samples in the range of 360 nm respectively were: 0.01, 0.003, 0.005, 0.008 and
0.066.
The average of concentration of the absorbed material during the six months was
combined of the range of 220 nm and 360 nm was 0.0354.
Physical results such as determining the volume and stability of the syringes in the
samples were as follows: 4.99 ml, 4.96 ml, 4.99 ml, 4.98 ml and 4.94 ml respectively
for six months.
The average volumes of samples results after the six months were 4.97 ml.
The physical results also are no change in the shape of the syringe and no discoloration
in polypropylene used in the manufacture of single-use plastic syringes despite no ideal
storage conditions.
The ideal storage conditions should not exceed 30°C and 60% relative humidity for
medical and pharmaceutical consumers.
