D-Leucine CAS 328-38-1 HD-Leu-OH Mayeso 98.5 ~ 101.5% Factory High Quality

pH
Tengani 0.50g ya mankhwalawa, onjezerani 50ml ya madzi, kutentha kuti musungunuke, kuziziritsa, ndikudziwitsani motsatira malamulo (General 0631), pH mtengo uyenera kukhala 5.5 ~ 6.5.
Kutumiza kwa Solution
Tengani 0.50g ya mankhwalawa, onjezani 50ml yamadzi, kutentha kuti musungunuke, ozizira, ultraviolet-visible spectrophotometry (General rule 0401), yesani transmittance pa 430nm wavelength, osachepera 98.0%.
Chloride
Tengani 0.25g ya mankhwalawa ndikuyiyang'ana motsatira malamulo (General Law 0801).Poyerekeza ndi njira yowongolera yopangidwa ndi 5.0 ml ya sodium chloride solution, sayenera kukhazikika (0.02%).
Sulfate
Tengani 1.0g ya mankhwalawa ndikuyiyang'ana molingana ndi lamulo (General Law 0802).Poyerekeza ndi njira yowongolera yopangidwa ndi 2.0 ml ya njira yokhazikika ya potaziyamu sulphate, sayenera kukhala yokhazikika (0.02%).
Ammonium Salt
Tengani mankhwalawa 0.10g, fufuzani molingana ndi lamulo (General ulamuliro 0808), ndi yerekezerani ndi njira yothetsera opangidwa muyezo ammonium kolorayidi njira 2.0 ML, osati zakuya (0,02%).
Amino Acid ena
Tengani kuchuluka koyenera kwa mankhwalawa, onjezerani madzi kuti musungunuke ndikusungunula kuti mupange yankho lomwe lili ndi pafupifupi 20mg pa lml ngati njira yoyesera;Tengani 1ml kuti muyese bwino ndikuyiyika mu botolo la 200ml, tsitsani muyeso ndi madzi, gwedezani, ngati njira yothetsera;Tengani kuchuluka koyenera kwa leucine reference ndi valine reference, ndikuyika mu botolo loyezera lomwelo, madzi adawonjezeredwa kuti asungunuke ndi kuchepetsedwa kuti akonze yankho lomwe lili ndi pafupifupi 0.4mg iliyonse pa 1ml ngati njira yothetsera dongosolo.Malinga ndi mayeso woonda wosanjikiza chromatography (General 0502), kuyamwa pamwamba atatu zothetsera aliyense 5 u1, motero, pa silika gel osakaniza G woonda wosanjikiza mbale, ndi n-butanol-madzi-glacial acetic asidi (3:1:1) kwa chitukuko, pambuyo pa kutumizidwa, kuyanika mpweya, kupopera mbewu mankhwalawa ndi ninhydrin mu acetone solution (1-50), kutentha pa 80 ° C mpaka mawanga atawonekera, ndikuwunika nthawi yomweyo.Njira yothetsera vutoli iyenera kuwonetsa malo omveka bwino, ndipo njira yothetsera vutoli iyenera kusonyeza mawanga awiri olekanitsidwa.Ngati yankho loyesa likuwonetsa mawanga odetsedwa, mtunduwo suyenera kukhala wozama (0.5%) kuposa malo akulu owongolera.
Kutaya pa Kuyanika
Tengani mankhwalawa, owuma pa 105 ℃ kwa maola 3, kuchepa kwa thupi sikudzapitirira 0.2% (General Act 0831).
Zotsalira pa Ignition
Tengani 1.0g ya chinthuchi ndikuchiyang'ana molingana ndi malamulo (General Law 0841).Zotsalira zomwe zatsala siziyenera kupitirira 0.1%.
Mchere wa Chitsulo
Tengani 1.5g ya chinthuchi ndikuchiyang'ana motsatira malamulo (General Law 0807).Poyerekeza ndi njira yowongolera yopangidwa ndi 0.001% yazitsulo zokhazikika, sizikhala zozama ().
Zitsulo Zolemera
Zotsalira zomwe zatsala pansi pa chinthu chotengera chotsalira choyatsira sizikhala ndi magawo opitilira 10 pa miliyoni imodzi yazitsulo zolemera zikafufuzidwa ndi lamulo (General Principles 0821, Law II).
Mchere wa Arsenic
Onjezani 5ml madzi, 1ml sulfuric acid ndi 10ml sulfurous acid, kutentha kwa pafupifupi 2ml mu osamba madzi, kuwonjezera 5ml madzi, kuwonjezera Dropwise ammonia solution mpaka chizindikiro cha phenolphthalein ndi ndale, kuwonjezera hydrochloric acid 5ml, kuwonjezera madzi kupanga 28ml. , malinga ndi kufufuza kwalamulo (General Principles 0822 Lamulo loyamba), liyenera kutsatira zomwe zili (0.0001%).
Bakiteriya Endotoxin
Tengani mankhwalawa, fufuzani molingana ndi lamulo (General 1143), lg leucine iliyonse yomwe ili ndi endotoxin iyenera kukhala yosakwana 25EU.(Ya jakisoni)
328-38-1 - Kutsimikiza Kwazinthu
Tengani mankhwalawa pafupifupi 0.1g, kulemera kwake molondola, kuwonjezera anhydrous formic acid 1 ml kusungunuka, kuwonjezera glacial acetic asidi 25ml, malinga ndi potentiometric titration njira (General lamulo 0701), ndi perchloric asidi titration njira (O. 1 mol/L) titration , ndipo zotsatira za titration zinakonzedwa ndi mayeso opanda kanthu.1 ml iliyonse ya perchloric acid titration solution (0.1 mol/L) imafanana ndi 13.12 mg ya C6H13N02.