All reagents presented purity > 99% (sodium thiosulfate, sodium chloride, methanol, and acetone) and standards were purchased from Sigma Aldrich and Restek. A 200 mg L−1 stock solution was prepared from a mixed standard of four trihalomethanes, i.e., chloroform, bromodichloromethane, chlorodibromomethane, and bromoform at 2000 µg mL−1 (Restek), and methanol, all reagents were of chromatography-grade. The other working solutions (100 µg mL−1 until 1 µg mL−1) were prepared by dilution from the stock solution with methanol. The standard, stock, and working solutions were stored at 4 °C [15 (link)].
Methanol
Manufactured by Restek
Sourced in United States
Methanol is a clear, colorless, and flammable liquid. It has a distinctive alcoholic odor. Methanol is commonly used as a solvent, fuel, and chemical feedstock in various industrial applications.
Automatically generated - may contain errors
Lab products found in correlation
2 protocols using methanol
1
Trihalomethanes Quantification Protocol
2
Quantification of Acrylamide using Stable Isotope
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Native AA of concentration 1004 µg/mL in methanol (99% purity) was purchased from Restek (Benner Circle, Bellefonte, U.S.) and labelled acrylamide (1,2,3-13 C labelled AA) (99% purity) of concentration 1000 µg/mL in methanol (+100 ppm hydroquinone) used as internal standard (IS) was acquired from Cambridge Isotope Laboratories (Andover, MA, USA). All solvents and reagents were of analytical grade, special for chromatography and were purchased from Merck (Darmstadt, Germany), LGC Promochem GmbH (Wesel, Germany), Alfa Aesar (Thermo Fisher Scientific, USA). Ultrapure water was obtained through a PURELAB Option-S7 and PURELAB Ultra Ionic system (Elga Labwater, High Wycombe, UK).
To assess the quality control, a certified reference material "acrylamide in rusk" (ERM ® -BD274, BAM, Berlin, Germany) with the certified value of 74 μg/kg was used.
To assess the quality control, a certified reference material "acrylamide in rusk" (ERM ® -BD274, BAM, Berlin, Germany) with the certified value of 74 μg/kg was used.
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