| 7 | 1/1 | 返回列表 |
| 查看: 1123 | 回復(fù): 6 | ||
[求助]
誰有頭孢美唑內(nèi)酯(cefmetazole lactone)的結(jié)構(gòu)式
|
|
誰有頭孢美唑內(nèi)酯(cefmetazole lactone)的結(jié)構(gòu)式? 頭孢美唑有關(guān)物質(zhì)做液質(zhì)大家都用什么液相條件? |

銅蟲 (初入文壇)
銀蟲 (小有名氣)




版主 (文壇精英)
老痞
|
JP16液相方法 Detector: An ultraviolet absorption photometer (wave- length: 214 nm). Column: A stainless steel column 4.6 mm in inside diame- ter and 25 cm in length, packed with octadecylsilanized silica gel for liquid chromatography (5 mm in particle diameter). Column temperature: A constant temperature of about 25℃ Mobile phase: Dissolve 5.75 g of ammonium dihydrogen- phosphate in 700 mL of water, add 280 mL of methanol, 20 mL of tetrahydrofuran and 3.2 mL of 40% tetrabutylammo- nium hydroxide TS, and adjust to pH 4.5 with phosphoric acid. Flow rate: Adjust the flow rate so that the retention time of cefmetazole is about 8 minutes. System suitability System performance: When the procedure is run with 10 mL of the standard solution under the above operating con- ditions, cefmetazole and the internal standard are eluted in this order with the resolution between these peaks being not less than 10. System repeatability: When the test is repeated 5 times with 10 mL of the standard solution under the above operat- ing conditions, the relative standard deviation of the ratios of the peak area of cefmetazole to that of the internal stand- ard is not more than 2.0%. |

| 7 | 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] 289求調(diào)劑 +8 | 新時代材料 2026-03-27 | 8/400 |
|
|---|---|---|---|---|
|
[考研] 0703化學(xué) +6 | 妮妮ninicgb 2026-03-27 | 6/300 |
|
|
[考研] 一志愿南師大0703化學(xué) 275求調(diào)劑 +4 | Ripcord上岸 2026-03-27 | 4/200 |
|
|
[考研] 322求調(diào)劑 +4 | 舊吢 2026-03-24 | 4/200 |
|
|
[考研] 材料求調(diào)劑 +8 | @taotao 2026-03-21 | 8/400 |
|
|
[考研] 材料求調(diào)劑 +5 | .m.. 2026-03-25 | 5/250 |
|
|
[考研] 一志愿吉大071010,316分求調(diào)劑 +3 | xgbiknn 2026-03-27 | 3/150 |
|
|
[考研]
|
鐘llll 2026-03-26 | 4/200 |
|
|
[考研] 342求調(diào)劑 +3 | 加油a李zs 2026-03-26 | 3/150 |
|
|
[考研] 321求調(diào)劑 +6 | Ymlll 2026-03-24 | 6/300 |
|
|
[考研] 081200-11408-276學(xué)碩求調(diào)劑 +3 | 崔wj 2026-03-26 | 3/150 |
|
|
[考研] 340求調(diào)劑 +3 | Amber00 2026-03-26 | 3/150 |
|
|
[考研] 考研一志愿蘇州大學(xué)初始315(英一)求調(diào)劑 +3 | sbdksD 2026-03-24 | 4/200 |
|
|
[考研] 0703化學(xué)求調(diào)劑 +6 | 奶油草莓. 2026-03-22 | 7/350 |
|
|
[考研] 生物學(xué)學(xué)碩求調(diào)劑 +7 | 小羊睡著了? 2026-03-23 | 10/500 |
|
|
[考研] 311求調(diào)劑 +3 | 冬十三 2026-03-24 | 3/150 |
|
|
[考研] 300分,材料,求調(diào)劑,英一數(shù)二 +5 | 超贊的 2026-03-24 | 5/250 |
|
|
[考研] 接收2026碩士調(diào)劑(學(xué)碩+專碩) +4 | allen-yin 2026-03-23 | 6/300 |
|
|
[考研] 070300,一志愿北航320求調(diào)劑 +3 | Jerry0216 2026-03-22 | 5/250 |
|
|
[考研] 材料學(xué)碩301分求調(diào)劑 +7 | Liyouyumairs 2026-03-21 | 7/350 |
|