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Showing 1-30 of 18658 results
GC Injection Port Septa: Use, Maintenance, Storage and Handling
Proper handling and preventative maintenance instructions for injection port septa; tips to improve the performance of gas chromatography instruments.
Retentate filtration with Millicup™-FLEX disposable vacuum filtration units
Methods and tutorial video for filtration techniques in contamination analysis using a faster alternative to glass vacuum filtration systems.
Non-volatile and Volatile Buffer Systems
This page shows volatile and non-volatile buffer suggestions for anion and cation exchange chromatography.
Selection of Purification Equipment
This page covers the standard ÄKTAdesign configurations for simple IEX chromatography.
Resolving by Mass
Resolving by Mass
Determination of Water Content in Pyridine Using Karl Fischer Titration
Summary application report for analysis of moisture in pyridine
Qualitative Thin Layer Chromatography Analysis Ginkgo
Qualitative Thin Layer Chromatography Analysis of Flavonoids and Quantification of Terpene Lactones in Ginkgo Biloba Extracts and Tablets
Analytical Method: Copper (total) in feedstuffs
Photometric determination with Cuprizon subsequent to acid mineralisation
Analytical Method: Aluminium (total) in effluents
Photometric determination with Chromazurole S subsequent to acid mineralisation; DIN decomposition
Analytical Method: Analytical Quality Assurance, Standard for Chlorine dioxide
Preparation of a standard solution for Chlorine dioxide acc. to DIN EN ISO 7393
PLC Plates for Separations from Milligrams to Grams
Our Preparative layer (PLC) plates allow separation and purification of samples varying in quantity – from milligrams to grams.
Determination of the Deterioration of Bleachability Index (DOBI) of Raw Palm Oil acc. to DIN EN ISO 17932:2011
Method: UV/VIS spectrophotometry; Method No. 2524
Determination of Water Content in Formic Acid Using Karl Fischer Titration
Summary application report for analysis of moisture in Formic acid
Determination of Water Content in Amino acids Using Karl Fischer Titration
With the exception of prolin, amino acids are hardly soluble in alcohols. Therefore, only the adherent moisture can be determined by the direct volumetric method.
Determination of Water Content in Petroleum Using Karl Fischer Titration
Summary application report for analysis of moisture in Petroleum
Analytical Method: Sulfite in Shrimps
Method: Photometric determination with 2,2'-dinitro-5,5'-dithiodibenzoic acid (Ellman's reagent)
Measuring Flows For Gas Chromatography – Volumetric vs. Mass
When choosing a flowmeter, it is essential to consider the attributes and needs of the application. This article provides information related to measuring GC flow rate by both volume and mass.
Iodine in Table Salt
Analytical Method: Iodine in table salt
Determination of Water Content in Acetone Using Karl Fischer Titration
Summary application report for analysis of moisture in Acetone
Determination of Caffeine in Energy Drinks with HPTLC-MS
Thin layer chromatography coupled with mass spectrometry does not require substantial sample preparation. Energy drinks can be applied without dilution directly onto the TLC plate.
Determination of Water Content in Ammonia, aqueous Using Karl Fischer Titration
Summary application report for analysis of moisture in Ammonia, aqueous
Determination of Water Content in sulfuric acid Using Karl Fischer Titration
Summary application report for analysis of moisture in sulfuric acid
Determination of Water Content in Acetic acid Using Karl Fischer Titration
Summary application report for analysis of moisture in Acetic acid
How to use Scepter™ 2.0 Cell Counter
The Scepter™ cell counter uses the Coulter principle of impedance-based particle detection to reliably and accurately count every cell in your sample.
Preparation of Competent Cells and Transformation with pGEX DNA
This page describes preparation of competent cells and transformation with pGEX DNA.
Washing Microparticles
Microparticles protocol for washing particles may be done via centrifugation. This procedure must be performed carefully.
Media Preparation – Plant Tissue Culture Protocol
Preparation from Packaged Powder, Preparation from Basal Salt Solutions, Banana Powder Preparation and Use, Coconut Water Preparation and Use
Initiating a Starter Culture
Initiating a Starter Culture
Quantitative NMR for Content Assignment of Reference Standards for Quality Control of Herbal Medicinal Products
qNMR has proven to be appropriate as a primary analytical method for the certification of natural products as reference standards for QC of herbal medicinals.
New GC-MS Method for Mycotoxin Analysis
An article regarding A New GC-MS Method for Mycotoxin Analysis Using 13C-marked Mycotoxin Derivatives from Sigma-Aldrich.com
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