Посоветуте хроматографы для ЦЗЛ >>>

Ответов в этой теме: 253   Страница: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26   «« назад || далее »»

[ Ответ на тему ]

30.10.2010 // 16:06:37     

---

---

КонстантинС пишет:

---

Composition of the mobile phase: the amount of the minor
solvent component may be adjusted by ± 30 per cent relative
or ± 2 per cent absolute, whichever is the larger (see example
above). No other component is altered by more than 10 per
cent absolute.
pH of the aqueous component of the mobile phase: ± 0.2 pH,
unless otherwise stated in the monograph, or ± 1.0 pH when
neutral substances are to be examined.
Concentration of salts in the buffer component of a mobile
phase: ± 10 per cent.
Detector wavelength : no adjustment permitted.
Stationary phase:
— column length: ± 70 per cent,
— column internal diameter: ± 25 per cent,
— particle size: maximal reduction of 50 per cent, no
increase permitted.
Flow rate : ± 50 per cent. When in a monograph the retention
time of the principle peak is indicated, the flow rate has to be
adjusted if the column internal diameter has been changed.
No decrease of flow rate is permitted if the monograph uses
apparent number of theoretical plates in the qualification
section.
Temperature : ± 10 per cent, to a maximum of 60 °C.
Injection volume: may be decreased, provided detection and
repeatability of the peak(s) to be determined are satisfactory.

---

Папа, а ты с кем сейчас разговаривал?