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Analysis of Alkylphenols and Alkylphenol Ethoxylates Using new 13C-Labeled and Deuterated Internal Standards According to ISO 18857-2
Alkylphenols are starting materials for the synthesis of alkylphenol ethoxylates, which are widely used as non ionic tensides, dispersive agents in paper and leather manufacturing, emulsifiers for pesticide formulations and as auxiliary agents for drilling and flotation.
GC Analysis of Volatiles in Milk on Supel-Q™ PLOT after SPME using a 75 µm PDMS/Carboxen Fiber
Separation of 4-Methyl-2-pentanone; Dimethyl disulfide; Hexanal; 3-Methylpentane; Acetone
Analytical Method: Chlorophyll-a, -b, -c as per APHA 10200-H
APHA 10200-H describes a measurement against an extraction solution. When the method was zeroed using the stated reagents, no difference in absorbance was found compared with zeroing the method using water for analysis. It is hence possible to use water
Determination of Water Content in Acetone Using Karl Fischer Titration
Summary application report for analysis of moisture in Acetone
AD030 Particle Monitoring Guide – Analysis Techniques – Microscope-Based Techniques
Microscopy is an effective way to determine the nature, size, and source of contamination. In this section, you can find some detailed methods important for optical microscopy, as well as important considerations for scanning electron microscopy (SEM).
Syringe Care
Syringes are precision instruments and need care. Learn to correctly inspect, use, unclog, handle, clean and store them to ensure good accuracy, reproducibility, and lifetime.
AD030 Particle Monitoring Guide – Analysis Techniques – Microscope-Based Techniques
AD030 Particle Monitoring Guide – Analysis Techniques – Microscope-Based Techniques
Immunofluorescence Labeling of Cells
Cell staining can be divided into four steps: cell preparation, fixation, application of antibody, and evaluation.
Enzymatic Assay of Phytase (EC 3.1.3.8)
Derived from procedure SSPHYT02. Includes template updates to current SOP specifications and incorporation of notes into the procedure.
Trans Fats in Cookies using SP-2560 and SLB-IL111
Extraction of lipids as fatty acids, and subsequent detection of trans fats from a cookie sample made using partially hydrogenated vegetable oils - a Supelco technical article
Solid Phase Extraction: Normal Phase Methodology
Retention occurs through polar interaction between the sorbent and analytes. Typical sample matrices that can be employed in normal-phase SPE include hydrocarbon or fatty oils diluted in a solvent like hexane, isooctane, chlorinated solvent, THF, diethyl ether, or ethyl acetate.
Packing a Column and Performing a Separation with Sephadex® LH-20
This page shows how to perform a separation with a Sephadex LH-20 column from Cytiva which are Size Exclusion Chromatography media of polysaccharide network made from cross-linked hydroxypropylated dextran beads.
Cleaning Laboratory Glassware
Learn how to properly clean your laboratory glassware to improve your lab technique and insure high quality results. The most carefully executed piece of work may give an erroneous result if dirty glassware is used.
Column packing and preparation for Ion Exchange Chromatography & Chromatafocusing
This page shows how to perform column packing and preparation for ion exchange chromatography and chromatafocusing when using Tricorn or XK columns available from Cytiva.
Column Packing and Preparation
This page describes efficient column packing and preparation for affinity chromatography of tagged proteins using Cytiva products.
Column Packing and Preparation for Affinity Chromatography with Specific Groups of Biomolecules
Column packing and preparation for Affinity Chromatography with specific groups of biomolecules.
Determination of Water Content in Methyl Ethyl Ketone, 2-Butanone Using Karl Fischer Titration
Summary application report for analysis of moisture in Methyl ethyl ketone, 2-Butanone.
In Situ Cell Death Detection Kit, Fluorescein Protocol & Troubleshooting
In Situ Cell Death Detection Kit, Fluorescein Protocol & Troubleshooting
ReadyBlue Protein Gel Staining Protocols
ReadyBlue™ Protein Gel Stain is a rapid and sensitive colloidal Coomassie® stain for polyacrylamide gels. The stain is provided as a ready-to-use solution, allowing for a fast and simplified protocol.
Preparing the Plexcore® PV 1000 Ink System
Preparing the Plexcore® PV 1000 Ink System
GenElute™ RNA/DNA/Protein Plus Purification Kit
GenElute RNA/DNA/Protein Plus Purification Kit provides a rapid method for the isolation and purification of total RNA, genomic DNA and proteins sequentially from a single sample of cultured animal cells, small tissue samples, blood, bacteria, yeast, fungi or plants.
Column Packing and Preparation for Affinity Chromatography with Specific Groups of Biomolecules
Column packing and preparation for Affinity Chromatography with specific groups of biomolecules.
Cleaning Up Samples using 2-D Clean-Up Kit
2-D Clean-Up Kit from GE Healthcare is designed to prepare samples that would otherwise produce poor 2-D results.
Fractional Precipitation Protocol for Affinity Chromatography Samples
This page shows describes fractional precipitation for removing gross impurities from affinity chromatography samples with small volumes.
Coupling Small Ligands Through Carboxyl Groups via a Spacer Arm
Ligands are coupled in a simple one-step procedure in the presence of a coupling reagent, carbodiimide. The carbodiimides may be regarded as anhydrides of urea.
Cleaning Up Samples using 2-D Clean-Up Kit
2-D Clean-Up Kit from Cytiva is designed to prepare samples that would otherwise produce poor 2-D results.
Western Blotting Sample Preparation
The emphasis of this page is on the rules and good practice in sample preparation for Western Blots.
radiello® Diffusive Air Sampling Application - Volatile Organic Compounds (VOCs) Chemically Desorbed With CS2
radiello® Diffusive Air Sampling Application - Volatile Organic Compounds (VOCs) Chemically Desorbed With CS2
Standards for ISO 18857-2
Analysis of alkylphenols and alkylphenol ethoxylates: Sigma-Aldrich is pleased to offer the complete range of labeled compounds listed in ISO 18857-2 for the analysis of OP, NP and their mono- and diethoxylates.
Qualitative Thin Layer Chromatography Analysis Ginkgo
Qualitative Thin Layer Chromatography Analysis of Flavonoids and Quantification of Terpene Lactones in Ginkgo Biloba Extracts and Tablets
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