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zwjzbx

金虫 (正式写手)

[求助] 谁有头孢美唑内酯(cefmetazole lactone)的结构式

谁有头孢美唑内酯(cefmetazole lactone)的结构式?
头孢美唑有关物质做液质大家都用什么液相条件啊?
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痴夷子皮

版主 (文坛精英)

老痞

优秀版主优秀版主

【答案】应助回帖

★ ★ ★
感谢参与,应助指数 +1
lk590: 金币+1, 谢谢参与 2012-03-29 16:09:46
zwjzbx: 金币+2, ★有帮助, 谢谢 这个条件我有啊 液质不能用磷酸二氢铵啊 2012-03-29 18:56:26
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%.
守候在风中的宁静。
7楼2012-03-29 16:06:14
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ycy2008

铜虫 (初入文坛)

【答案】应助回帖

感谢参与,应助指数 +1
去scifinder上面看看就知道了,很多东西还是需要亲自做才行
2楼2012-03-29 11:09:58
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yamaqiao

银虫 (小有名气)

感谢参与,应助指数 +1
lk590: 应助指数-1, 无意义,属于交流 2012-03-29 16:09:21
这位朋友是做头孢美唑钠?呵呵呵。
我不是因你而来到这个世界,却是因为你而眷恋这个世界。
3楼2012-03-29 11:37:17
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zwjzbx

金虫 (正式写手)

引用回帖:
3楼: Originally posted by yamaqiao at 2012-03-29 11:37:17:
这位朋友是做头孢美唑钠?呵呵呵。

是啊, 你也做过? 留个QQ号吧
锻炼自己,不断成长!
4楼2012-03-29 11:41:37
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