General Procedure for the Copper-Catalyzed Cycloaddition (Batch Conditions, Conventional Heating): Scheme 4. Compound 3 (11 mg, 0.013 mmol) was weighed into a 10-mL Biotage vial.
General Procedure for the Copper-Catalyzed Cycloaddition (MW Conditions): Scheme 4. Compound 3 (11 mg, 0.013 mmol) was weighed into a 10-mL Biotage microwave vial.
General Procedure for the Copper-Catalyzed Cycloaddition Under Flow Conditions: An X-Cube flash flow reactor, equipped with a 16 mL coil, was adjusted to the following settings: T = 130 °C, 4.0 mL min 1 flow, p = 80 bar.
This procedure was applied for copper determination in natural food samples.
Accuracy was confirmed by copper determination in the standard reference material, NIST SRM 1570a trace element units in Spinach Leaves and by spike tests with recovery levels ranging from 93 to 100%; the procedure was applied for copper determination in tobacco leaf samples collected in Cruz das Almas City, Bahia, Brazil.
The method developed is a precise and accurate alternative to conventional procedures for determining copper in real samples.
This article describes the application of response surface methodology (RSM) to the development of a procedure for zinc and copper determination by flame atomic absorption spectrometry (FAAS) in food samples after extraction by a microwave system.
In this work, a flow analysis procedure for the determination of copper, chromium, iron and lead in lubricating oils using flame AAS as detection technique is described.
Such an immersion procedure is termed as one cycle for copper indium sulfide deposition, and this immersion cycle was repeated several times until the desired amount of CuInS2 QDs was incorporated.
The present paper describes the development of a microwave assisted digestion procedure for the determination of zinc, copper and nickel in tea samples employing flame atomic absorption spectrometry (FAAS).
