Table 2 DLS results of the optimum sample and the 30-day stability at different temperatures

FN

Primary sample

1

86.3

FN

After a month at a temperature of 22–24 °C

1

98.7

FN

After a month at a temperature of 3–4 °C

1

97.9

FN

After a month at a temperature of − 3 to − 4 °C

1

105

FN

After a month at a temperature of − 20 ° C

1

127

NN

Primary sample

1

23

NN

After a month at a temperature of 22–24 °C

1

37.3

NN

After a month at a temperature of 3–4 °C

1

43.1

NN

After a month at a temperature of − 3 to − 4 °C

1

79.9

NN

After a month at a temperature of − 20 °C

1

102