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原理 尿液在酸性条件下,用乙酸乙酯萃取,经浓缩,以条状点在硅胶薄层上。展开后,用对二甲氨基苯甲醛显色,所生成的二条黄棕色条状
Principle Urine in acidic conditions, extracted with ethyl acetate, concentrated to strip the point in the thin layer of silica gel. Unfolded, with p-dimethylaminobenzaldehyde color, the resulting two yellow-brown bar