@parrotstem1
беше тук преди 1 година, 4 месеци
From this stock solution, working solutions with concentrations of 200, 50, 10, 5, 1, and 0.5 ng/mL were ready with methanol. A 10 μg/mL IS inventory resolution was diluted with methanol to offer the IS working solution with a focus of 100 ng/mL. Our natural and analytical chemists specialize within the rapid growth of manufacturing processes […] Виж