Under optimized conditions, a linear range between 0.5 and 10 µg L −1 was obtained with a correlation coefficient of 0.997 for six calibration points. Sample preparation methodology was optimized using a multivariate optimization strategy. Then, an ultrasound-assisted procedure is employed to back-extract the mercury into 10 µL of a 4 M HCl aqueous solution, which is finally analyzed using SPCnAuEs. Mercury complex with ammonium pyrrolidinedithiocarbamate is extracted from sample solution into the water-immiscible IL formed in-situ. In-situ IL-DLLME is based on a simple metathesis reaction between a water-miscible IL and a salt to form a water-immiscible IL into sample solution. For more detail consult the manual.A novel approach is presented, whereby gold nanostructured screen-printed carbon electrodes (SPCnAuEs) are combined with in-situ ionic liquid formation dispersive liquid–liquid microextraction (in-situ IL-DLLME) and microvolume back-extraction for the determination of mercury in water samples. Once the experiment is complete save the data by selecting Save scan as in the file menu, choosing a file name and then clicking save. The procedure will start when you click start (during the scan you can rescale the data by pressing F4). Set the parameters to the values you require in the edit procedure window (then save the procedure if you will need it again). Start the GPES software, in the method menu select the method you intent to execute and then using open procedure command in the file menu open procedure you require. Switch on both interface boxes and then the autolab and then start up the PC (log on and then the Booter should find the autolab if it does not restart the PC). You should be aware that generally it is possible to select the optimal settings before an experiment normally it will be necessary to perform some trial runsusing different parameters. It is intended to help you find the most appropriate technique and to easily reach an optimal configuration. In this explanation of Electrochemical Methods each technique is be explained in a concise manner, supplemented with detailed information about Autolabs technical implementation. It goes through each command individually explaining its function and implementation. The software (GPES) manualexplains how to complete all the possible experiments and data analysis. This is a very flexible and instrument, so rather than giving a through explanation of all funtions a brief overview of the general procedure is given here along with links to the software manual and a summary, provided by the manufactures, of the electrochemical methods available with the Autolab. Operation of the Autolab type II potentiostat/galvanostat
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