I think within the 48 hours you can check the ,LP, PP and LFT tests from the serum samples for better result.

OK, Thank you!

Refer to the WHO document in the link below –

https://apps.who.int/iris/bitstream/handle/10665/65957/WHO_DIL_LAB_99.1_REV.2.pdf?.sequence=1

See section 5 - Samples and Stability of analytes.

The table indicates stabilities in whole blood/ serum /plasma for all biochemical analytes at

a range of storage conditions

OK! Thank you dear Sarah-Jane

Firstly blood samples of ewes must kept for separating serum arraund 24 hours in room temperature and it's better to put the tube of samples in 45 angle

Secondly collected serm must store in - 20

Thank you Emad, for how long?

Add to Dr Amad answer, serum alteration is due to gel-degel phenomenon associated to light shorting. If there is not light shorting, the serum may be kept for several days about 3 weeks.

At -20°c

What should I do if want to conserve the serum for few months?

n fact, it is best to take DNA immediately after taking a blood sample, without freezing the blood. Long-term storage of blood samples had no effect on DNA methylation, but some information was lost over time.

selon les paramètres; le véritable problème c'est la congélation decongélation.

pour la conservation à -20°c elle va de quelques semaines voir des années;

mais selon mon expérience à ne pas dépasser 6mois surtout pour les hormones

les enzymes 3 mois les autres paramètres plus de 6 mois.

for Lipid profile serum samples can be stored at -20 over 6 month duration. Protein profile and enzymes for 1-2 month. But for glucose it is required to collect the sample in fluoride bulb and better to use plasma for accurate results. Always analyze fresh samples for best results. otherwise use preservative like sodium azide for long term preservation to avoid fungal growth.

Answer: Prior to shipment or for a maximum of 48 hours, serum should be kept between 4 and 8°C. 7 days. Serum samples held for longer periods of time should be frozen at or below 20°C and sent to the testing facility on frozen ice packs.

Prior to shipment or for a maximum of 48 hours, serum should be kept between 4 and 8°C. 7 days