Abstract: Pipette tip, pipette body and method for analysis. The pipette tip (1) comprises a tip body (6) having an inner surface (I) and an outer surface (O). The tip body comprises a first end (3) and a second end (4) having a flow opening (19). The tip body (6) is provided with a first optical grating structure (7) arranged to conduct light away from the tip body to the side of the inner surface (I). The tip body is provided with a receiving grating structure (8) arranged to receive light conducted away from the tip body through the first optical grating structure. The first end (3) comprises a light-receiving surface (9) optically connected through the tip body to the first optical grating structure. The first end (3) comprises a surface (10) that conducts light away and is optically connected through the tip body to said receiving optical grating structure (8).