Additionally, acetone and ethanol were added to ... an aqueous solution whose pH was adjusted to 9 using acetic acid (2%) and NaOH (1 M) solutions was used. After the determination of the FA-CS ...
High levels of glucose, albumin, ascorbic acid, tetracycline or cephalexin, or large amounts of oxalic acid, may inhibit the reaction and lead to false-negative results. Vaginal contamination can ...