Adenine CAS 73-24-5 Assay 98.0%~102.0% (Titration) Hale Hana Maʻemaʻe Kiʻekiʻe

Loaʻa iā Adenine ka NLT 98.0% a me ka NMT 102.0% o C 5H5N5, i helu ʻia ma ke kumu maloʻo.
IKE
A. KA PALAPALA INFRARED <197K>
HANA
HANA
Laʻana: 200 mg o Adenine
Pākaʻa: 80 mL o ka hui ʻana o 100 mL o ka waikawa acetic glacial a me 300 mL o ka anhydride acetic
Pūnaehana Titrimetric
Ke ʻano: Hoʻohālikelike pololei
Titrant: 0.1 N no ka chloric acid VS i hoʻopaʻa ʻia penei: E hoʻololi i 300 mg o ka potassium biphthalate i kahi beaker 150-mL a, ma ka hoʻoulu ʻana, e hoʻoheheʻe ʻia i loko o 80 mL o ka hui ʻana o 100 mL o ka waikawa acetic glacial a me 300 mL o ka acetic anhydride.Titrate me ka hoʻonā waiuma chloric.ʻO kēlā me kēia 20.42mg o ka potassium biphthalate e like me 1 mL o 0.1 N perchloric acid.
ʻImi hope: Potentiometric
Nānā: E hoʻoheheʻe i ka Laʻana i loko o 80 mL o ka hui ʻana o 100 mL o ka ʻakika acetic glacial a me 300 mL o ka anhydride acetic ma ka hoʻoulu ʻana, a e titrate me ka Titrant.E helu i ka pākēneka o Adenine (C5H5N5) ma ka ʻāpana i lawe ʻia:
Ka hopena = [(V − B) × N × F × 100]/W
V = Laʻana titrant volume (mL)
B = Ka nui titrant pāʻani (mL)
N = ka mea maʻamau titrant (mEq/mL)
F = helu kaulike, 135.13 mg/mEq
W = ke kaumaha o ka Laʻana (mg)
Nā pae ʻae ʻae: 98.0%–102.0% ma ke kumu maloʻo
NA mea haumia
Nā mea haumia ʻole
KA HOʻOPIʻI KOE <281>: NMT 0.1%
NA METAL HEAVY, Hana II <231>: NMT 10ppm
Nā mea haumia kino
HANA
pH 7.0 phosphate buffer: E hoʻoheheʻe i 4.54 g o monobasic potassium phosphate i loko o ka wai e hana i 500 mL o ka hopena.E hoʻoheheʻe i 4.73 g o ka sodium phosphate anhydrous dibasic i loko o ka wai e hana i 500 mL o ka hopena.E hoʻohui i ka 38.9 mL o ka solution potassium phosphate monobasic me 61.1 mL o ka solution dibasic sodium phosphate.E hoʻololi, inā pono, ma ka hoʻohui dropwise o ka solution sodium phosphate dibasic i ka pH o 7.0.
Haʻina waiwai maʻamau: E hoʻoheheʻe i ka nui kūpono o USP Adenine RS i loko o ka wai wela, maʻalili, a hoʻoheheʻe ʻia me ka wai no ka loaʻa ʻana o ka hopena i ʻike ʻia he 0.19 mg/mL.
ʻO nā haʻina maʻamau: Pipet 5-mL ʻāpana o ka solution stock Standard i loko o ʻekolu pahu volumetric 100-mL, a hoʻoheheʻe me 0.10 N hydrochloric acid, 0.010 N sodium hydroxide, a me ka pH 7.0 phosphate buffer, kēlā me kēia, i ka nui.
Laʻana waihona waihona: E hoʻoheheʻe i ka nui kūpono o Adenine i loko o ka wai wela, maʻalili, a hoʻoheheʻe ʻia me ka wai no ka loaʻa ʻana o ka hopena i ʻike ʻia he 0.19 mg/mL.
Laʻana waihona waihona: E hoʻoheheʻe i ka nui kūpono o Adenine i loko o ka wai wela, maʻalili, a hoʻoheheʻe ʻia me ka wai no ka loaʻa ʻana o ka hopena i ʻike ʻia he 0.19 mg/mL.
Nā hāʻina laʻana: Pipet 5-mL ʻāpana o ka Sample stock solution i loko o ʻekolu pahu volumetric 100-mL, a hoʻoheheʻe me 0.10 N hydrochloric acid, 0.010 N sodium hydroxide, a me ka pH 7.0 phosphate buffer, kēlā me kēia, i ka nui.
Nā kūlana spectrometric
(E nānā i ka Spectrophotometry a me ka Hoʻomāmā <851>.)
Ke ano: UV-Vis
Ka lōʻihi o ka nalu: 220–320 nm
Kelepona: 1 knm
Blank: Wai
Kānāwai
Nā Laʻana: Nā hāʻina maʻamau a me nā hāʻina laʻana
Nā pae hoʻoholo: ʻO nā absorptivities paʻa, i helu ʻia ma ke kumu maloʻo, ma nā nalu o ka hoʻopaʻa ʻana kiʻekiʻe, no kēlā me kēia pālua o nā haʻina like ʻaʻole ʻokoʻa ma mua o 2.0%.
NA HOAO KUAI
LOSSON DRYING <731>: Hoʻomaloʻo i kahi laʻana ma 110 ° no 4 h: nalowale NMT 1.0% o kona kaumaha.
NITROGEN CONTENT, Keʻano II 〈461〉: 50.2%–53.4%, helu ʻia ma ke kumu maloʻo
NA KOI HOU
PACKAGING a me ka mālama ʻana: mālama i loko o nā pahu paʻa maikaʻi.
USP REFERENCE STANDARD <11>
USP Adenine RS