Anion-exchange extraction of cephapirin, cefotaxime, and cefoxitin from serum for liquid chromatography
نویسندگان
چکیده
منابع مشابه
Determination of niacin in infant formula by solid-phase extraction and anion-exchange liquid chromatography.
A peer-verified, solid-phase extraction (SPE)/anion exchange liquid chromatographic method is presented for the determination of niacin in milk-based and soy-based infant formula. Analysis is in 3 steps: test sample digestion, extraction/cleanup, and liquid chromatography (LC). Digestion uses a standard AOAC digestion procedure that involves autoclaving at 121 degrees C for 45 min in (1 + 1) H2...
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Most phosphoproteomics experiments rely on prefractionation of tryptic digests before online liquid chromatography-mass spectrometry. This study compares the potential and limitations of electrostatic repulsion-hydrophilic interaction chromatography (ERLIC) and anion-exchange chromatography (AEX). At a pH higher than 5, phosphopeptides have two negative charges per residue and are well-retained...
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Background:The dynamic binding capacity (DBC) of a chromatography matrix in protein purification is the amount of the total protein absorbed into the matrix, before occurrence of a significant break in the breakthrough curve. Optimization of the process criteria for maximum DBC avoids extra process scale-up and reduces ...
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In rat serum as well as in human serum and bile after injection of cefotaxime (CTX), the parent compound and the active metabolite desacetyl cefotaxime (dCTX) have been demonstrated by quantitative analysis with high-performance liquid chromatography (HPLC). Simultaneous determination of CTX by bioassay using test organisms sensitive to both CTX and dCTX resulted in spuriously high concentratio...
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آنزیم تریپسین در شرایط قلیایی ناپایدار می باشد .و فعالیت پروتئولیتیکی تریپسین منجربه خود هضمی آن در جایگاههای خاصی می گردد. بنابر این آنزیمی با ناپایداری بالا محسوب میگردد. در سالهای اخیر موفق شدند که با ایجاد تغیرات شیمیایی با اضافه کردن فلزات خاص ، کلسیم و یا عمل استیلاسیون منجر به افزایش پایداری آنزیم تریپسین گردند. مطالعات در حال حاضر نشان می دهد که تریپسین استیله شده فعالیت آنزیمی خود را ...
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ژورنال
عنوان ژورنال: Antimicrobial Agents and Chemotherapy
سال: 1982
ISSN: 0066-4804,1098-6596
DOI: 10.1128/aac.21.4.628