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App Notes

Results 1071–1080 of 1444

Analysis of copolymer levels in polymer pellets by near-infrared spectroscopy

| Contributed by Metrohm

This Application Note describes the determination of copolymer levels in polyethylene (PE) and polyvinylacetate (PVA) pellets using NIRS.

Polarographic determination of styrene in polystyrenes and copolymers

| Contributed by Metrohm

The determination of the acid value, the hydroxyl value, and the isocyanates plays an important part in the analysis of raw materials for plastics. This application describes the determination of these characteristic values by automatic potentiometric titration.

Chlorine, bromine, and sulfur in low-density polyethylene applying Combustion Ion Chromatography (CIC)

| Contributed by Metrohm

Halogen and sulfur analysis in waste materials is crucial. The inline combination of the Mitsubishi combustion module with Metrohm IC offers the right tool for these types of samples.

Water determination in various plastics

| Contributed by Metrohm

The presence of excessive water in plastics adversely affects the performance of polymeric goods which is why water determination is of crucial importance.

Determination of the acid value, hydroxyl value, and isocyanates in raw materials for the fabrication of plastics by automatic potentiometric titration

| Contributed by Metrohm

The determination of the acid value, the hydroxyl value, and the isocyanates plays an important part in the analysis of raw materials for plastics. The present bulletin describes the determination of these characteristic values by automatic potentiometric titration.

Vitamin D Level Determination in Serum

| Contributed by YMC

Vitamin D3 (cholecalciferol) is essential for the human body. Low levels of vitamin D3 increase the risk of illness from a range of disorders.

Dioxin determination on air filter samples

| Contributed by Buchi

This application note describes the pressurized solvent extraction of dioxins and furans from air filter samples (PUF and QFF) using the SpeedExtractor E-914.

NEW! 200 m GC Columns for Detailed Analysis of cis/trans FAME Isomers

| Contributed by Sigma Aldrich

Over the last half of the previous century, the use of partially hydrogenated vegetable oil (PHVO) replaced the use of animal fats for baking purposes in most western countries.

Time saving, high resolution GPC/SEC using micro columns and optimized RI detection

| Contributed by PSS

Efficient and fast separation for low molar mass polymers and proteins can be achieved using a combination of micro columns and optimized micro detectors. This application note shows data for the SECcurity µRI compared to an analytical RI.

Rapid, Sensitive, and Quantitative LC/MS/MS Determination of Digitoxin and Digoxin in Plasma

| Contributed by Supelco

Using a Simple Procedure for Simultaneous Cleanup of Phospholipids and Proteins

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