L-Aspartic Acid CAS 56-84-8 (H-Asp-OH) Nyocha 98.5 ~ 101.0% Ụlọ ọrụ dị elu

L-aspartic acid, mgbe akpọnwụwo, nwere ọ bụghị ihe na-erughị 98.5% na ọ bụghị ihe karịrị 101.0% nke L-Aspartic Acid (C4H7NO4).
Nkọwa L-Aspartic acid pụtara dị ka ọcha, kristal orcrystalline ntụ ntụ.Ọ na-agbaze nke ọma na mmiri, yana ọ fọrọ nke nta ka ọ ghara ịsacha ya na ethanol (99.5).Ọ na-agbaze na mmiri hydrochloric acid na 0.2 mol/L sodium hydroxide TS.
Chọpụta ụdịdị nnabata infrared nke L-Aspartic Acid dị ka akwadoro na usoro potassium bromide disk n'okpuru Infrared Spectrophotometry <2.25>, wee tụle ụdịdị dị iche iche na Spectrum Reference: ha abụọ na-egosipụta ike nke absorption n'otu nọmba ebili mmiri.
Ntugharị anya <2.49> [a] 20D: +24.0 ~ + 26.0° (2 g, mgbe ihichachara, 6 mol/L hydrochloric acid TS, 25 ml, 100 mm).
pH <2.54> Gbarie 0.4 g nke L-Aspartic Acid na 100 ml mmiri site na ikpo ọkụ, ma kwe ka ọ dị jụụ: n'etiti 2.5 na 3.5.
Ịdị ọcha (1) Ịdị ọcha na agba nke ngwọta-agbari 1.0 g nke L-Aspartic Acid na 20 ml nke 1 mol / L hydrochloric acid TS: ngwọta doro anya na enweghị agba.
(2) Chloride <1.03> - Gbanyụọ 0.5 g nke L-Aspartic Acid na 6 ml nke nitric acid dilute na 20 ml mmiri, gbakwunye mmiri iji mee 50 ml, wee mee ule ahụ na ngwọta a dị ka ngwọta ule.Kwadebe ngwọta nchịkwa na 0.30 ml nke 0.01 mol / L hydrochloric acid VS (ọ bụghị karịa 0.021%).
(3) Sulfate <1.14> - Gbanyụọ 0.6 g nke L-Aspartic Acid na 5 ml nke dilute hydrochloric acid na 30 ml mmiri, tinye mmiri iji mee 45 ml, tinye 5 ml nke barium chloride TS.Mee ule ahụ na ngwọta a dị ka ngwọta ule.Jiri 0.35 ml nke 0.005 mol/L sulfuric acid VS dozie ihe nchịkwa, tinye 5 ml nke dilute hydrochloric acid na mmiri iji mee 45 ml, tinye 5 ml nke barium chloride (ọ bụghị karịa 0.028 ~).
(4) Ammonium <1.02>-Mee ule na 0.25 g nke L-Aspartic Acid.Kwadebe ngwọta njikwa na 5.0 ml nke Standard Ammonium Solution (ọ bụghị karịa 0.02z)
(5) Ọla dị arọ <1.07>-Gaa n'ihu na 1.0 g nke L-Aspartic Acid dịka usoro 4 si dị, wee mee ule ahụ.Kwadebe ngwọta nchịkwa na 1.0 ml nke Standard Lead Solution (ọ bụghị karịa 10 ppm).
(6) Iron <1.10> - Kwadebe ihe ngwọta ule na 1.0 g nke L-Aspartic Acid dị ka usoro 1 si dị, ma mee testaccording na Usoro A. Kwadebe ngwọta nchịkwa na 1.0 ml nke Standard Iron Solution (ọ bụghị ihe karịrị 10). ppm).
(7) Ihe ndị metụtara ya - gbazee 0.20 g nke L-AsparticAcid na 10 ml nke 0.2 mol/L sodium hydroxide TS, wee jiri ngwọta a dị ka ihe nlele nlele.Pipet 1 mL nke ngwọta nlele, gbakwunye mmiri iji mee kpọmkwem 10 ml.Pipet 1 mLof ihe ngwọta a, gbakwunye mmiri iji mee kpọmkwem 50 ml, ma jiri ngwọta a dị ka ọkọlọtọ ọkọlọtọ.Jiri ngwọta ndị a mee ule ahụ dị ka eduzi n'okpuru Thin-layer Chromatogra-phy<2.03>.Kpatụ 5mL nke ọ bụla n'ime ihe nlele nlele na ngwọta nkwụnye na efere nke silica gel maka chromatog-raphy nke dị nro, mepụta na ngwakọta nke 1-butanol, mmiri na aceticacid (100) (3: 1: 1) na a anya nke ihe dịka 10 cm, wee kpoo efere ahụ na 809C maka nkeji 30.Fesa ihe ngwọta nke nin-hydrin nke ọma na ngwakọta nke methanol na acetic acid (100) (97: 3) (1 n'ime 100), na ikpo ọkụ na 80 ℃ maka nkeji 10: ntụpọ na-abụghị isi ntụpọ nwetara na sample. ngwọta adịghị ike karịa ntụpọ e nwetara na ọkọlọtọ ngwọta.
Ọnwụ na ihicha <2.41> Ọ bụghị ihe karịrị 0.30% (1 g, 105 ℃, awa 3).
Ihe fọdụrụ na mgbanye <2.44> Ọ bụghị karịa 0.1% (1 g).
Nyochaa nha nke ọma ihe dịka 0.15 g nke L-aspartic acid, nke akpọnwụworị, gbarie na 50 ml mmiri site na ikpo ọkụ.Mgbe ọ dị jụụ, titrate <2.50> na 0.1 mo/L sodium hydroxide VS (titration potentiometric).Mee mkpebi efu n'otu ụzọ ahụ, ma mee mgbazi ọ bụla dị mkpa.
Otu ml nke 0.1 mol/L sodium hydroxide VS 13.31 mg nke C4H7NO4
Ebube na ihe nchekwa-akpa ndị siri ike.