Adenine CAS 73-24-5 Whakamātautau 98.0%~102.0% (Titration) wheketere parakore teitei

Kei roto i te Adenine te NLT 98.0% me te NMT 102.0% o C 5H5N5, kua tatauhia i runga i te tikanga maroke.
WHAKATAUTANGA
A. KAUPAPA INFRARED <197K>
WHAKAMAHI
WHAKAMAHI
Tauira: 200 mg o Adenine
Putea: 80 mL o te ranunga o te 100 mL o te waikawa ahetiki glacial me te 300 mL o te anhydride acetic
Pūnaha Titrimetric
Aratau: Te titration tika
Titrant: 0.1 N mo ia waikawa chloric VS kua whakatauritea penei e whai ake nei: Whakawhitihia te 300 mg o te pāhare pāporo biphthalate ki te ipurau 150-mL, a, ma te whakakorikori, ka memeha ki roto i te 80 mL o te ranunga o te 100 mL o te waikawa acetic glacial me te 300 mL o te anhydride acetic.Whakatairitea ki te wairewa waikawa maataa.Ko ia 20.42mg o te pāhare pāporo biphthalate he rite ki te 1 mL o te waikawa perchloric 0.1 N.
Te kitenga ira mutunga: Potentiometric
Tātaritanga: Whakarewahia te Tauira i roto i te 80 mL o te ranunga o te 100 mL o te waikawa ahetiki huka me te 300 mL o te anhydride acetic ma te whakakorikori, me te titrate ki te Titrant.Tātaihia te ōrau o te Adenine (C5H5N5) i te wahanga i tangohia:
Hua = [(V − B) × N × F × 100]/W
V = Tauira titrant rōrahi (mL)
B = rōrahi titrant pātea (mL)
N = te titore noa (mEq/mL)
F = tauwehe taurite, 135.13 mg/mEq
W = te taumaha o te Tauira (mg)
Paearu whakaae: 98.0%–102.0% i runga i te tikanga whakamaroke
NGA POKE
Nga poke parakore
WHAKAMAHI TOHUTOHU <281>: NMT 0.1%
NGA METAL TAHA, Tikanga II <231>: NMT 10ppm
Nga poke pararopi
WHAKAMAHI
pH 7.0 phosphate buffer: Whakarewahia te 4.54 g o te pāhare pāporo phosphate monobasic ki te wai hei hanga 500 mL o te otinga.Whakarewahia te 4.73 g o te konutai konutai phosphate anhydrous dibasic ki te wai hei hanga 500 mL o te wairewa.Whakaranuhia te 38.9 mL o te wairewa konutai phosphate monobasic ki te 61.1 mL o te wairewa konutai konutai phosphate dibasic.Whakaritea, mehemea e tika ana, ma te taapiri i te wairewa konutai phosphate dibasic ki te pH 7.0.
Te otinga kararehe paerewa: Whakarewahia te rahinga tika o te USP Adenine RS ki te wai wera, whakamatao me te waimeha ine ki te wai kia whiwhi ai i te otinga e mohiotia ana ko te 0.19 mg/mL.
Wairewa Paerewa: Pitohia nga wahanga 5-mL o te wairewa rakau Paerewa ki roto i nga ipu 100-mL e toru, ka waimeha ki te 0.10 N waikawa pūhaumāota, 0.010 N te konutai waihā, me te pH 7.0 phosphate buffer, ki te rōrahi.
Tauira otinga kararehe: Whakarewahia te rahinga Adenine ki roto i te wai wera, whakamatao me te waimeha ine ki te wai kia whiwhi ai i te otinga e mohiotia ana ko te 0.19 mg/mL.
Tauira otinga kararehe: Whakarewahia te rahinga Adenine ki roto i te wai wera, whakamatao me te waimeha ine ki te wai kia whiwhi ai i te otinga e mohiotia ana ko te 0.19 mg/mL.
Tauira rongoā: Putiputia nga wahanga 5-mL o te Tauira wairewa kararehe ki roto i nga ipu ruri 100-mL e toru, me te waimeha ki te 0.10 N waikawa pūhaumāota, 0.010 N konutai waihā, me te pH 7.0 phosphate buffer, ia, ki te rōrahi.
Ngā tikanga tūāpapa
(Tirohia te Spectrophotometry me te Marara-marama <851>.)
Aratau: UV-Vis
Awhe ngaru: 220–320 nm
Pūtau: 1 cm
Patea: Wai
Tātaritanga
Tauira: Nga otinga paerewa me nga otinga Tauira
Paearu Whakaaetanga: Ko nga waahanga whakaurunga, kua tatauhia i runga i te whakamaroke, i nga roangaru o te moohio nui, mo ia takirua o nga otinga e rite ana kaore i te rereke i te 2.0%.
NGA WHAKAMATAUTANGA
TE WHAKAMAROKE NGARO <731>: Me whakamaroke he tauira ki te 110 ° mo te 4 haora: ka ngaro te NMT 1.0% o tona taumaha.
NITROGEN CONTENT, Tikanga II 〈461〉: 50.2%–53.4%, kua tatauhia i runga i te tikanga maroke
HE WHAKAMAHI ATU
PAKITANGA ME TE WHAKAPUTANGA: Tiakina ki roto i nga ipu kua kati pai.
USP REFERENCE STANDARD <11>
USP Adenine RS