D-Serine CAS 312-84-5 HD-Ser-OH Assay 99.0 ~ 101.0% Hoobkas Zoo

Acidity pH
Noj 0.30g ntawm cov khoom no, ntxiv 30ml dej kom yaj, thiab ntsuas raws li txoj cai (General rule 0631).Tus nqi pH yuav tsum yog 5.5 ~ 6.5.
Transmittance ntawm kev daws teeb meem
noj 1.0g ntawm cov khoom no, ntxiv dej 20ml kom yaj, raws li ultraviolet-pom spectrophotometry (Txoj cai 0401), txiav txim siab transmittance ntawm lub wavelength ntawm 430mn, tsis tsawg tshaj li 98.0%.
Chloride
Noj 0.25g ntawm cov khoom no thiab xyuas nws raws li txoj cai (Txoj cai 0801).Piv nrog rau kev tswj cov tshuaj ua los ntawm 5.0 ml ntawm standard sodium chloride tov, nws yuav tsum tsis txhob muaj ntau concentrated (0.02%).
Sulfate
Noj 1.0g ntawm cov khoom no thiab xyuas nws raws li txoj cai (Txoj cai 0802).Piv nrog rau kev tswj kev daws teeb meem ua los ntawm 2.0 ml ntawm cov txheej txheem potassium sulfate tov, nws yuav tsum tsis txhob muaj ntau concentrated (0.02%).
Ammonium ntsev
noj 0.10g ntawm cov khoom no thiab xyuas nws raws li txoj cai (Txoj cai 0808).Piv nrog rau kev tswj cov tshuaj ua los ntawm 2.0 ml ntawm tus qauv ammonium chloride tov, nws yuav tsum tsis txhob tob (0.02%).
Lwm yam Amino Acids
Siv cov khoom tsim nyog ntawm cov khoom no, ntxiv dej kom yaj thiab dilute los ua cov tshuaj uas muaj txog 20mg ib lml raws li kev sim tshuaj;Siv 1ml rau kev ntsuas qhov tseeb thiab muab tso rau hauv 200ml ntsuas lub khob, dilute mus rau lub teev nrog dej, co zoo, raws li kev tswj kev daws teeb meem;Siv tus nqi tsim nyog ntawm serine siv thiab methionine siv raws li, thiab muab tso rau hauv tib lub khob ntsuas, dej tau ntxiv rau yaj thiab diluted los npaj cov tshuaj uas muaj txog 0.4mg txhua ib 1ml raws li kev daws teeb meem.Raws li cov txheej txheem nyias chromatography (General 0502), nqus cov saum toj no peb cov kev daws teeb meem txhua 5 u1, raws li, ntawm tib silica gel G nyias txheej phaj, nrog n-butanol-dej-glacial acetic acid (3: 1: 1) rau txoj kev loj hlob, tom qab xa mus, huab cua kom qhuav, txau nrog ninhydrin hauv cov tshuaj acetone (1-50), cua sov ntawm 80 ° C kom txog thaum cov pob tshwm, thiab kuaj tam sim ntawd.Kev tswj kev daws teeb meem yuav tsum pom qhov pom tseeb, thiab cov txheej txheem siv tau yuav tsum pom ob qhov sib cais tag nrho.Yog tias cov tshuaj ntsuam xyuas qhia pom qhov tsis huv, cov xim yuav tsum tsis txhob sib sib zog nqus (0.5%) tshaj qhov chaw tseem ceeb ntawm kev tswj cov tshuaj.
Poob rau ziab
noj cov khoom no, qhuav ntawm 105 ℃ rau 3 teev, poob ntawm qhov hnyav yuav tsum tsis pub tshaj 0.2% (Txoj cai 0831).
Residue ntawm Ignition
Tsis ntau tshaj 0.1% (Txoj cai 0841).
Hlau ntsev
Noj 1.0g ntawm cov khoom no thiab xyuas nws raws li txoj cai (Txoj cai 0807).Piv nrog rau kev tswj kev daws teeb meem ua los ntawm 0.001% ntawm cov qauv hlau tov, nws yuav tsum tsis txhob sib sib zog nqus ().
Hnyav Hlau
Noj 2.G ntawm cov khoom no, ntxiv 23ml dej kom yaj, ntxiv 2ml ntawm acetate buffer (pH3.5), thiab xyuas raws li txoj cai (thawj txoj cai lij choj 0821), uas muaj cov hlau hnyav yuav tsum tsis pub tshaj 10 feem. ib lab.
Arsenic ntsev
Noj cov khoom no 2. G, ntxiv dej 23ml yaj, ntxiv hydrochloric acid 5ml, raws li txoj cai tshuaj ntsuam xyuas (General Principles 0822 thawj txoj cai), yuav tsum ua raws li cov kev cai (0.0001%).
Cov kab mob endotoxin
Noj cov khoom no, xyuas raws li txoj cai lij choj (General 1143), tus nqi ntawm endotoxin hauv txhua lg serine yuav tsum tsawg dua 12EU.(rau txhaj tshuaj)
312-84-5 - Kev Txiav Txim Cov Ntsiab Lus
Noj cov khoom no txog 0.1g, precision hnyav, ntxiv anhydrous formic acid 1 ml kom yaj, ntxiv glacial acetic acid 25ml, raws li txoj kev potentiometric titration (General 0701), nrog perchloric acid titration tov (0.1 mol / L) titration, thiab cov txiaj ntsig ntawm titration tau raug kho nrog kev kuaj dawb.Txhua 1 ml ntawm perchloric acid titration tov (0.1 mol / L) sib raug rau 10.51 mg ntawm C3H7N03.