Abstract: An auxiliary test paper detection device includes a reagent cap and a test paper cassette. The reagent cap contains a detection reagent, a sealing member is arranged at an opening of the reagent cap. The sealing member can be opened or removed under action of external force. Test paper is arranged in the test paper cassette, a sample absorption section of the test paper is exposed, an observation window is formed in the test paper cassette. A result display area of the test paper corresponds to the observation window. A connecting structure for connecting the test paper cassette and the reagent cap is provided, and when the test paper cassette and the reagent cap are connected through the connecting structure, a closed space is formed in an inner cavity of the reagent cap. The sample absorption section of the test paper extends into the inner cavity of the reagent cap.

Abstract: Disclosed in the present disclosure are a hydroxybutyl chitin, a hydroxybutyl chitin hydrogel and a preparation method thereof. Chitin is subjected to pulverization, dissolution, modification with epoxybutane, and purification to obtain a final product, namely the hydroxybutyl chitin. The hydroxybutyl chitin prepared by the method has good solubility in purified water, and a hydrogel with a low solid content can be formed. The hydroxybutyl chitin hydrogel will have a wide application aspect in biomedicine, absorbable materials, and other fields.