| 2 | 1/1 | 返回列表 |
| 查看: 722 | 回復: 1 | ||
[求助]
雜質(zhì)峰 已有1人參與
|
|
HPLC色譜圖上峰面積是4的小峰要不要當成雜峰看?可以不把它當成峰嗎? 發(fā)自小木蟲IOS客戶端 |
木蟲 (正式寫手)
| 在USP<621>中對最后一段中對雜質(zhì)的取舍進行了規(guī)定,原文如下:When the impurity test prescribes the total of impurities or there is a quantitative determination of an impurity, choice of an appropriate threshold setting and appropriate conditions for the integration of the peak areas is important. In such tests the limit at or below which a peak is disregarded is generally 0.05%. Thus, the threshold setting of the data collection system corresponds to at least half of this limit. Integrate the peak area of any impurity that is not completely separated from the principal peak, preferably by valley-to-valley extrapolation (tangential skim). |

| 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] 2026考研求調(diào)劑-材料類-本科211一志愿985-初試301分 +3 | 蟲友233 2026-03-07 | 3/150 |
|
|---|---|---|---|---|
|
[考研] 085600材料與化工,一志愿廣州985,求調(diào)劑 +12 | qqyyaill 2026-03-05 | 12/600 |
|
|
[考研] 考研一志愿長安大學材料與化工309分請求調(diào)劑 +4 | dtdxzxx 2026-03-06 | 6/300 |
|
|
[考研] 085701環(huán)境工程專業(yè),初試305,均過國家A區(qū)線 +5 | 卡卡來了@ 2026-03-07 | 6/300 |
|
|
[考研] 289求調(diào)劑 +10 | yang婷 2026-03-02 | 12/600 |
|
|
[考研] 267化工調(diào)劑求助 +7 | 聰少OZ 2026-03-04 | 7/350 |
|
|
[考研] 278求調(diào)劑 +5 | Gale1314 2026-03-06 | 5/250 |
|
|
[考研] 物理學求調(diào)劑 +3 | sx宋 2026-03-05 | 3/150 |
|
|
[考研] 求調(diào)劑 一志愿蘇州大學,0856化工323分 | 本科應化 | 有專利/競賽/科研助手經(jīng)歷 | +5 | 橙子cyx 2026-03-06 | 6/300 |
|
|
[考研] 材料與化工354調(diào)劑 +4 | Lucy-xiao 2026-03-06 | 7/350 |
|
|
[考研] 一志愿蘇大材料工程專碩293求調(diào)劑 +3 | 鋼鐵大炮 2026-03-04 | 3/150 |
|
|
[考研] 0856材料專碩274能調(diào)劑去哪里? +3 | 22735 2026-03-04 | 4/200 |
|
|
[考研] 求調(diào)劑院校 +6 | 云朵452 2026-03-02 | 12/600 |
|
|
[考研] 一志愿鄭州大學,學碩,物理化學, 333求調(diào)劑 +5 | 李魔女斗篷 2026-03-04 | 5/250 |
|
|
[考研] 求調(diào)劑 +7 | 博斯特525 2026-03-04 | 7/350 |
|
|
[考研] 0854總分272 +5 | 打小就是老實人 2026-03-02 | 6/300 |
|
|
[基金申請] 請問大家,研究風險與應對措施那里, 大家都怎么寫呢 ? +3 | cauasen 2026-03-02 | 3/150 |
|
|
[考研] 292求調(diào)劑 +3 | sgbl 2026-03-03 | 3/150 |
|
|
[論文投稿]
通訊作者寫誰,問題是你意想不到的問題
15+3
|
阿爾法啊 2026-03-01 | 3/150 |
|
|
[考博] 誠招農(nóng)業(yè)博士 +3 | 心欣向榮 2026-02-28 | 3/150 |
|