| 摘要 |
PURPOSE:To prevent the development of the unaccustomed feeling to the user accustomed to the conventional method, by cutting an end of the paper impregnated with sodium p-aminobenzoate in the form of sharp triangle. CONSTITUTION:The end part 5 impregnated with sodium p-aminobenzoate is made to be different from the other end 2 impregnated with cloramin T, e.g, by cutting to form an angle of 45 deg. with the long side of the filter paper strip. When the test paper having the above shape is dipped in a spcimen by directing the end impregnated with sodium p-aminobenzoate downward, the shape of the end different from that of the other end gives an effective mark to prevent the miss to dip the wrong end. The sodium p-aminobenzoate impregnated in the test paper dissolves in the specimen liquid, and acts as a color developer. When the specimen is niacin-positive, the liquid discolors in yellow color similar to the conventional method, and accordingly, the determination can be carried out without giving unaccustomed feeling even to a user accustomed to the conventional method.
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