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August 30, 2016 15:57
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Glovebox TR1.14 Guidelines
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\usepackage[english]{babel} | |
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\hypersetup{unicode=true, pdftex, colorlinks=true, linkcolor=blue, citecolor=blue, filecolor=blue, urlcolor=blue, pdftitle=Gr. Palomares - Glovebox Guidelines, pdfauthor=Ilario Gelmetti, pdfsubject=Glovebox} | |
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\usepackage{titling} % for moving up the title | |
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\usepackage{changes} % for having \textsubscript | |
\pagenumbering{gobble}% Remove page numbers (and reset to 1) | |
\title{Glovebox TR1.14 Guidelines} | |
\subtitle{} | |
\author{ICIQ - Gr. Palomares - Ilario Gelmetti} | |
\date{} | |
\begin{document} | |
\maketitle | |
\section*{How to use the antichambers} | |
\begin{itemize} | |
\item Don't introduce in the antichamber closed \textbf{containers} with oxygen: insert them \textbf{opened or filled with inert gas}. | |
\item If you introduce closed containers, consider that the cap could pop out because of the vacuum and spread your compound in the antichamber, take proper countermeasures. | |
\item \textbf{Never introduce solvents containing water.} | |
\end{itemize} | |
\subsubsection*{Detailed procedure for inserting small objects:} | |
\begin{enumerate} | |
\item Make vacuum in the antichamber (this pulls the internal door in the proper position); | |
\item refill with nitrogen; | |
\item \textbf{leave the tap in closed position} (if you leave it in refill position acts like a big hole in the GB); | |
\item open the external door and introduce your objects, all the containers should be opened; | |
\item close and make vacuum, wait until the vacuum gauge goes under its minimum and some time more; | |
\item refill slowly (the gas flow could throw your stuff around); | |
\item when the gauge approaches the max pressure switch again to vacuum (don't leave it at max pressure unless it's the last cycle); | |
\item repeat two more times (a total of \textbf{three vacuum-nitrogen cycles} for the small antichamber); | |
\item refill, open the internal door, remove your object, close the internal door and \textbf{leave the antichamber under vacuum} (doors are leaky). | |
\end{enumerate} | |
\subsubsection*{Detailed procedure for extracting small objects:} | |
\begin{enumerate} | |
\item \textbf{Make vacuum} in the antichamber (even if you think it's under nitrogen, it is not: doors of the small antichamber are leacky); | |
\item refill with nitrogen, open the internal door, put your stuff, close the internal door taking care it goes in the right position; | |
\item make vacuum in the antichamber (this pulls the internal door in the proper position); | |
\item refill with nitrogen and \textbf{leave the tap in closed position} (if you leave it in refill position acts like a big hole in the GB); | |
\item open the external door and remove your objects; | |
\item close the door and \textbf{leave under vacuum}. | |
\end{enumerate} | |
\subsubsection*{Procedure for inserting big objects:} | |
\begin{itemize} | |
\item For using the big antichamber follow the same instructions as above but \textbf{six vacuum-nitrogen cycles} are suggested. | |
\item If possible, heat the big objects and introduce them while they're still hot. | |
\item Leave the big antichamber in \textbf{static vacuum}. | |
\end{itemize} | |
\section*{Before starting working} | |
\begin{itemize} | |
\item \textbf{Record the date, your name and H\textsubscript{2}O, O\textsubscript{2} concentrations} and all significant events (regenerations, malfunctions...) on the glovebox log book. | |
\item If you're going to use the spin coater or \textbf{solvents}, even if in small amounts, which damage the catalyzer (methylene chloride, acetonitrile, alcohols, amines), \textbf{stop the circulation} purifier while working then, when you finish, make a \textbf{quick purge} (10-40 min, in the Functions menu of the GB controller) and switch on again the circulation purifier (nitrogen is much cheaper than a replacement for a damaged catalyst). | |
\item When starting using the GB \textbf{lower the internal pressure} to approx 3-5 mbar (using the GB with too high pressure (14 mbar) makes the circulation purifier and the analyzer to shutdown). | |
\item For using the \textbf{spin coater vacuum pump}: first switch on the small pump and then open the vacuum tap on the back of the GB (remember to close and switch off later). | |
\item Use \textbf{lab coat and clean gloves} (the GB gloves are not clean, at all), if you have a watch, bracelet or rings better to remove them (for reducing the risk of making holes). | |
\item Always use aluminum foil for keeping clean the internal part of the spin coater. | |
\item If you're going to work with solvents put \textbf{gloves on also in the internal side} of the GB (do it, they're not uncomfortable, indeed they tighten the black gloves on your fingers giving a better grip). | |
\end{itemize} | |
\section*{After using the glovebox} | |
\begin{itemize} | |
\item \textbf{Label everything} and keep your products closed and \textbf{in a box with your name} on it, periodic cleaning will trash things arbitrarily, keep clean and you won't have to complain in vain. | |
\item \textbf{Throw the wastes} in a container and take it with you when you finish working, leave as little mess as possible for the next user, your wet wastes could still contaminate the glovebox. | |
\item Leave the spin coater lid open, this way the droplets and residual solvent vapors can get removed by the purge process. | |
\item Leave the \textbf{small antichamber under vacuum} (the doors are leaky). | |
\item Leave the big antichamber in static vacuum. | |
\item If you used the spin coater remember to first \textbf{close the vacuum tap} and then to \textbf{switch off the small pump}. | |
\item When finished using the GB \textbf{increase the internal pressure} to approx 10-12 mbar. | |
\end{itemize} | |
\section*{General guidelines} | |
\begin{itemize} | |
\item Remember that the small antichamber doors have leaks, vacuum-nitrogen cycle the antichamber even if it shouldn't be needed: \textbf{When in doubt - pump it out!} Do not make any assumptions! | |
\item Keep your samples open only when necessary. This is to avoid GB contamination and contamination of your samples. | |
\item When weighing materials in the glovebox, static electricity is a big problem. To minimize this disturbance use the antistatic gun. | |
\item Never keep needles around, throw them in the proper container, needles and cutting edges (e.g. glass sharp edges, scissors) are gloves' worst enemies. | |
\item Don't use the antichamber vacuum for removing solvents, the pump has no solvents trap. | |
\item Enter and exit the box slowly so that the overpressure doesn't get negative or too high (causing the GB circulation and analyzer to shutdown). | |
\end{itemize} | |
\end{document} |
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