Tài liệu HPLC for Pharmaceutical Scientists 2007 (Part 8B) pdf

Tài liệu HPLC for Pharmaceutical Scientists 2007 (Part 8B) pdf

Tài liệu HPLC for Pharmaceutical Scientists 2007 (Part 8B) pdf

... by the pressure limitation of the HPLC equipment. For more information on gradient separation and developing fast HPLC methods, see Chapter 17 and Practical HPLC Method Development from Synder ... 0.2- or 0.45-µm-pore-size filter is generally recommend for removal of particulates [15]. Filtration as a preventive maintenance tool for HPLC analyses is well-documented in the lit- er...
Ngày tải lên : 15/12/2013, 12:15
  • 17
  • 362
  • 1
Tài liệu HPLC for Pharmaceutical Scientists 2007 (Part 8C) pdf

Tài liệu HPLC for Pharmaceutical Scientists 2007 (Part 8C) pdf

... The experiments for w w pH 2–4 were performed on day 1, and those for w w pH 5–7 were performed on day 2 (≈36 hr after initial prepa- ration).A further investigation was performed by preparing ... height) for peak B ≤ 1.5 • Tailing factor (5% peak height) for peak A ≤ 1.5 • Rt for peak A must be 12.0 ± 1.3 min • Rt for peak B must be 21 ± 1.0 min • The S/N of the LOQ solution (0...
Ngày tải lên : 15/12/2013, 12:15
  • 21
  • 319
  • 1
Tài liệu HPLC for Pharmaceutical Scientists 2007 (Part 8D) pdf

Tài liệu HPLC for Pharmaceutical Scientists 2007 (Part 8D) pdf

... down the right path for initial mobile- phase pH selection. In the following case study for this pharmaceutical compound M, the method development scenario and rationale for each iteration in ... Figure 8-40A for the sample stored in the acidic diluent for 4 days at room temperature shows some degradation compared to Figure 8-40B for the sample stored in the acidic diluent for...
Ngày tải lên : 15/12/2013, 12:15
  • 17
  • 316
  • 1
Tài liệu HPLC for Pharmaceutical Scientists 2007 (Part 4B) pdf

Tài liệu HPLC for Pharmaceutical Scientists 2007 (Part 4B) pdf

... the basic analyte in its fully neutral form. 192 REVERSED-PHASE HPLC Step 1. First, account for the downward pK a shift for the basic analyte upon addition of organic. For every 10 v/v% increase in acetonitrile, ... Similar parameters have been determined for this family of compounds for methanol/water mixtures [80]. Using these parameters for each family of compounds for a pa...
Ngày tải lên : 24/12/2013, 18:15
  • 30
  • 228
  • 0
Tài liệu HPLC for Pharmaceutical Scientists 2007 (Part 4C) pdf

Tài liệu HPLC for Pharmaceutical Scientists 2007 (Part 4C) pdf

... RP HPLC. We hope that it will be useful for practical chro- matographers in their efforts to develop efficient and selective separation methods, and we also hope that it will be encouraging for ... properties. For acetonitrile/water systems it was found that acetonitrile forms thick adsorbed layer on the surface of hydrophobic bonded phase, while methanol adsorption from water formed a...
Ngày tải lên : 24/12/2013, 18:15
  • 37
  • 291
  • 0
Tài liệu HPLC for Pharmaceutical Scientists 2007 (Part 5) pdf

Tài liệu HPLC for Pharmaceutical Scientists 2007 (Part 5) pdf

... decreases, retention in normal-phase chromatography 241 HPLC for Pharmaceutical Scientists, Edited by Yuri Kazakevich and Rosario LoBrutto Copyright © 2007 by John Wiley & Sons, Inc. proved to be ... 5 NORMAL-PHASE HPLC Yong Liu and Anant Vailaya 5.1 INTRODUCTION High-performance liquid chromatography (HPLC) is a separation tool par excellence for the analysis of compounds .....
Ngày tải lên : 24/12/2013, 18:15
  • 21
  • 329
  • 0
Tài liệu HPLC for Pharmaceutical Scientists 2007 (Part 11) pdf

Tài liệu HPLC for Pharmaceutical Scientists 2007 (Part 11) pdf

... (i.e., spanning target identification → chemical 535 HPLC for Pharmaceutical Scientists, Edited by Yuri Kazakevich and Rosario LoBrutto Copyright © 2007 by John Wiley & Sons, Inc. while maintaining ... chemist to perform high- throughput purification.Although HPLC has long been a method available to the chemist for product purification, only recently have these systems been desi...
Ngày tải lên : 22/01/2014, 00:20
  • 41
  • 271
  • 0
Tài liệu HPLC for Pharmaceutical Scientists 2007 (Part 18) pdf

Tài liệu HPLC for Pharmaceutical Scientists 2007 (Part 18) pdf

... in pharmaceutical analysis. The precise and accurate control of temperature can improve repro- ducibility and method transferability (Section 18.2). In recent years, the use of 811 HPLC for Pharmaceutical ... eluent for reversed- phase high performance liquid chromatography, Anal. Commun. 33 (1996), 327–329. 57. R. M. Smith and R. J. Burgess, Superheated water as an eluent for rev...
Ngày tải lên : 22/01/2014, 00:20
  • 25
  • 280
  • 0
Tài liệu HPLC for Pharmaceutical Scientists 2007 (Part 20) pdf

Tài liệu HPLC for Pharmaceutical Scientists 2007 (Part 20) pdf

... manufacturing in the pharmaceutical industry. The HPLC (or LC) and MS (LC-MS) or NMR (LC-NMR) interface increases the capability of solving 901 HPLC for Pharmaceutical Scientists, Edited by ... operation for LC-NMR (Section 20.3.2), with the use of shielded cryomagnets, the location of the MS instru- ment will follow the same rule as for the HPLC. The most common modes of ope...
Ngày tải lên : 26/01/2014, 19:20
  • 36
  • 235
  • 0
Tài liệu HPLC for Pharmaceutical Scientists 2007 (Part 7A) pptx

Tài liệu HPLC for Pharmaceutical Scientists 2007 (Part 7A) pptx

... ions on the basis of mass-to-charge ratios, 281 HPLC for Pharmaceutical Scientists, Edited by Yuri Kazakevich and Rosario LoBrutto Copyright © 2007 by John Wiley & Sons, Inc. low-polarity ... the most widely used systems for analysis of large bio- molecules. For a continuous ion source, the ions can be stored for a short period of time and pulsed out for analysis. In the...
Ngày tải lên : 15/12/2013, 12:15
  • 29
  • 455
  • 3

Xem thêm

Từ khóa: