Table 1.

Reference material and sample classification.

Sample type	Matrix	Spike	Concentration range	Used to Characterize
A	Water	Food Dye Solution	N/A	ULOC Dilutor
B	Blank cookie extract	Total hazelnut protein (THP) extract	1–1000 ppm (v/v)	LFIA performance
C	Blank cookie	Total hazelnut protein (THP) extract	1–1000 ppm (v/w)	Homogenizer
D1	Blank cookie	Hazelnut cookie	0.1–100 ppm (w/w)	Total prototype
D2	Blank cookie	Hazelnut cookie & peanut cookie	0.1–100 ppm (w/w)	Total prototype