| 2 | 1/1 | 返回列表 |
| 查看: 748 | 回復(fù): 1 | |||
[交流]
USP鹽酸米諾環(huán)素溶出度測定 已有1人參與
|
|
如題,對于USP鹽酸米諾環(huán)素溶出度項下計算想跟各位同仁討論一下。 藥典原文涉及計算部分的摘錄如下: Standard stock solution: 0.11 mg/mL of USP Minocycline Hydrochloride RS in Medium Standard solutions: Dilute the Standard stock solution with Medium to obtain solutions with final concentrations of 0.088 mg/mL, 0.0528 mg/mL, 0.0352 mg/mL, 0.022 mg/mL, and 0.0176 mg/mL. Sample solution: dissolution solution Injection size: 20 μL for the 4 and 24 h time points; 50 μL for the 48 and 72 h time points Analysis: Construct a calibration curve for each sampling interval by plotting the concentration of the Standard solutions versus peak area. Calculate the slopes and y-intercepts using linear regression analysis. Calculate the release rate of minocycline: Resulti = [(rUi − yi)/Si] × 10/( i × W × A) i =sampling time, 4, 24, 48, 72 h rUi=peak response from each of the Standard solutions at time i yi =y-intercept of the calibration curve at sampling time i Si =slope of the calibration curve at sampling time i W =weight of the sample (mg) A =amount of minocycline in the sample (mg/mg of sample) as determined in the Assay 說明:溶出介質(zhì)體積10ml, Tolerances Time (h) Release Rate (μg/h) Average of 6 Measurements 0–4 NLT 25 4–24 NLT 1.0 24–48 NLT 0.2 48–72 NLT 0.05 具體溶出內(nèi)容與計算相關(guān)性不大,未摘錄,如有需要可以提供。 問題:1 按照說明,計算公式與i時間的溶出液沒有關(guān)系嗎?(溶出的樣品溶液,Sample solution沒參與計算); 2 如果公示中rUi寫錯,實為Sample solution的峰面積,這個計算最后的單位也無法得到ug/h? 3 不同時間進樣體積不一致,這種不一致也未在計算公式中體現(xiàn)出來。 本人非常困惑,還請廣大同仁指點指點,謝謝。 |

新蟲 (小有名氣)
| 2 | 1/1 | 返回列表 |
| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 085600,一志愿鄭州大學(xué),280分求調(diào)劑 +3 | Wuqi725 2026-03-05 | 3/150 |
|
|---|---|---|---|---|
|
[考研] 中科大材料299求調(diào)劑 +3 | DAIjiayo 2026-03-05 | 5/250 |
|
|
[考研] 328求調(diào)劑 +5 | vuzhdkfjkx 2026-03-04 | 6/300 |
|
|
[考研] 歡迎采礦、地質(zhì)、巖土、計算機、人工智能等專業(yè)的同學(xué)報考 +10 | pin8023 2026-02-28 | 13/650 |
|
|
[基金申請]
|
Doma 2026-03-01 | 10/500 |
|
|
[考研] 281電子信息求調(diào)劑 +5 | jhtfeybgj 2026-03-02 | 9/450 |
|
|
[考研] 22408-273求調(diào)劑-擔(dān)任3個項目的負(fù)責(zé)人-1篇國際期刊論文(一作)1篇核心期刊論文在投。 +3 | 沒想好取什么名 2026-03-03 | 3/150 |
|
|
[考研] 085600材料與化工 298 調(diào)劑 +9 | 小西笑嘻嘻 2026-03-03 | 9/450 |
|
|
[考研] 322分 085600求調(diào)劑,有互聯(lián)網(wǎng)+國金及主持省級大創(chuàng)經(jīng)歷 +6 | 熊境喆 2026-03-04 | 6/300 |
|
|
[考研] 266求調(diào)劑 +7 | 哇塞王帥 2026-03-03 | 7/350 |
|
|
[考研] 295求調(diào)劑 +4 | 小賽不吃香菜 2026-03-04 | 4/200 |
|
|
[考研] 一志愿西交大材料學(xué)碩 346 求調(diào)劑 +3 | zju51 2026-03-04 | 3/150 |
|
|
[考研] 322,求調(diào)劑 +3 | 菜菜愛玩 2026-03-04 | 3/150 |
|
|
[考博] 26申博 +5 | north, 2026-02-28 | 5/250 |
|
|
[考研] 290求調(diào)劑 +9 | ErMiao1020 2026-03-02 | 9/450 |
|
|
[考研] 299求調(diào)劑 +5 | kkcoco25 2026-03-02 | 9/450 |
|
|
[考研] 化工京區(qū)271求調(diào)劑 +7 | 11ing 2026-03-02 | 7/350 |
|
|
[考研] 288求調(diào)劑 +3 | 少71.8 2026-03-02 | 5/250 |
|
|
[考研] 求調(diào)劑 +7 | repeatt?t 2026-02-28 | 7/350 |
|
|
[論文投稿]
求助coordination chemistry reviews 的寫作模板
10+3
|
ljplijiapeng 2026-02-27 | 4/200 |
|