Showing 1 - 10 of 31 results

A Complete Solution for the Analysis of Volatile Organic Compounds (VOCs) in Water_2019.1 [AN015]

INTRODUCTION: Demand for lower detection limits of volatile organic compounds in drinking water requires the use of a mixed mode GC-MS system. The ability for simultaneous full scan and selection ion monitoring (SIM) is vital for low-level quantitation. The United State Environmental Protection Agency (US EPA) 524.3 method details the analytical method for the measurement of purgeable organic compounds in water by capillary gas chromatography with mass spectrometry. The SCION Single Quad (SQ) mass spectrometer has a unique feature, Compound Based Scanning (CBS), for easy automated setup and optimisation of complex mixed mode methods. CBS makes use of libraries that store all the essential information about a compound such as retention time, time window, qualifier and quantifier ions. Compounds are loaded directly into a method, scan times are optimised with data acquisition and processing tables synchronised. Managing large number of SIM acquisitions is made easy in mixed mode.

Analysis of 2,4-DNPH Derivatised Aldehydes by HPLC-DAD [AN0062]

Aldehydes are important compounds regularly use in the chemical industry. Sick house syndrome is a medical condition caused by poor air quality in enclosed indoor spaces and the presence of specific volatile organic compounds (VOCs) such as formaldehyde. It is vital that the level of formaldehyde and associated compounds are regularly measured and controlled especially in working environments in which formaldehyde is handled.
SCION Instruments developed a method for the simultaneous analysis of seven DNPH (2,4- Dinitrophenylhydrazine) derivatised aldehydes plus one derivatised ketone.

Analysis of DEHP in Drinking Water by HPLC-DAD [AN0064]

DEHP, bis-(2-ethylhexyl)phthalate, is one of the most prominent phthalate contaminants in drinking water. DEHP is also used as a plasticiser during plastic manufacturing. When ingested, it is a cancer-causing hazard and presents a high risk of liver function disorders. For this reason DEHP is a banned substance during food production, under the Restriction of Hazardous Substances (RoHS) Directive by the EU[1], and levels must be monitored. Although a banned substance, commercial sport drink manufactures have been known to substitute palm oil, a common emulsifier, for the more cost effective DEHP.
SCION Instruments developed a method for the identification of DEHP using HPLC and a Diode Array Detector (DAD)

Analysis of Greenhouse Gases by Gas Chromatography, May 2019.1 [AN012]

Nitrous Oxide (N2O), Carbon Dioxide (CO2) and Methane (CH4) are considered to be very powerful greenhouse gases. These gases reflect in the atmosphere, stopping the incoming and outgoing radiation that warms the Earth, thus causing the greenhouse effect. Continuously measuring the greenhouse gases gives insight into the source of the emissions, helping us fight climate change. A SCION 456 GC was custom configured specifically for the analysis for all three gases in a single matrix of atmospheric air containing water vapour.

Analysis of Mineral Oils Utilising Temperature Programmed Large Volume Injection, May 2019.1 [AN020]

INTRODUCTION: Mineral oil hydrocarbons are typically found in water, foods and soils. These hydrocarbons can be extracted using a variety of solvents, with the most popular being hexane and petroleum ether. As concentrations can be very low, sample enrichment is often required. However, SCION instruments developed a method that simply uses a Large Volume Injection (LVI) technique to simplify sample pre-treatment whilst dramatically increasing throughput. The Hydrocarbon Index (HOI) is the total amount of compounds which can be extracted from water samples using a non-polar solvent. The solvent must have a boiling point between 39℃ and 69℃, thus replacing the use of halogenated solvents. Halogenated solvents and high concentrations of polar substances can interfere with the determination of the HOI. In addition, the compounds must not absorb on Florisil and must elute between ndecane and n-tetracontane. The method is suitable for HOI determinations in concentrations above 0.1mg/L in water samples. This application note describes the highly efficient analysis of mineral oil hydrocarbons in water using the SCION 456 GC equipped with a Programmable Temperature Vaporiser (PTV). The system is very well suited to the DIN-EN-ISO 9377 method.

Detection of Ethylene Oxide (EO) Residue in Medical Protective Products (AN072)

Ethylene Oxide is a sterilization product used during the production of medical protective equipment such as face masks. With the current Corona Virus pandemic the use of face masks has become an every day essential item. The residual levels of Ethylene Oxide must be monitored and controlled, as exposure to excessive quantities can cause long term health issues. SCION Instruments developed a quick and reproducible method for the low-level detection and quantification of Ethylene Oxide in protective equipment.

Showing 1 - 10 of 31 results