I don't understand the procedure for this biology experiment. From investigation step d, it's really hard to understand as there are no helping images or else. Can anyone help me? - Quora
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PPT - Determination of the concentration of vitamin C by using DCPIP test PowerPoint Presentation - ID:478588
![Determination Vit C - Testing Foods for Vitamin C (Ascorbic Acid) Introduction A blue substance - Studocu Determination Vit C - Testing Foods for Vitamin C (Ascorbic Acid) Introduction A blue substance - Studocu](https://d20ohkaloyme4g.cloudfront.net/img/document_thumbnails/4db546e63a119fc67bba9b9a44aa3316/thumb_1200_1698.png)