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[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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1楼 2012-03-29 10:56:11

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【答案】应助回帖

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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%.