Development and validation of a micromethod for fast quantification of 5-n-alkylresorcinols in grains and whole grain products.

Highlights: [•] A micromethod was developed for quantification of 5-n-alkylresorcinols (5nARs). [•] The 5nARs react with a Fast Blue RR salt (FBRR) in an alkaline alcoholic medium. [•] Readings of new method are highly correlated (R 2 =0.99) with a Fast Blue B method. [•] Bland–Altman plot suggests that both methods can be interchangeably used. [•] The new micromethod saves time, reagents and solvents for quantification of 5nARs. [Copyright &y& Elsevier]