Establishment of an Experimental Procedure for Preparing Trial Serum Samples for the Specific Serodiagnosis of Toxocara canis for External Quality Assessment Schemes

Table 4

Results of the NTU values during the study period.

Time	Index	DK (freeze-dried samples)		DL (freezing samples)
		Stored at -80°C	Stored at 2-8 °C	Stored at -80°C	Stored at 2-8°C
1 month
	CV (%)	4.4	4.1	1.2	3.5
	value	>0.05	<0.05	>0.05	<0.05
3 months
	CV (%)	3.9	2.8	1.2	4.5
	value	>0.05	<0.05	>0.05	<0.05
6 months
	CV (%)	3.9	2.8	1.2	4.4
	p-value	<0.05	<0.05	>0.05	<0.05