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Wysłany: Pią 9:36, 09 Sie 2013 Temat postu: jordan Prepare solutions more efficiently without |
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In analytical laboratories preparing samples and standards for example, for high-performance liquid chromatography (HPLC) analysis is a time consuming, repetitive and error prone task. When preparing [link widoczny dla zalogowanych] solutions for [link widoczny dla zalogowanych] HPLC, the amount of substance is [link widoczny dla zalogowanych] defined by the glassware and target concentration. . The tolerance on the concentration defines how exact that amount must be dosed. For example, preparing a concentration of 1:1000 to within +/-10% requires dosing between 90 and 110mg into a 100ml volumetric flask. This can be a challenge especially when the substance is a paste or crème that is hard to dose.
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Today's advancements in preparing solutions make it possible to realize significant cost savings as the required amount of solution for today's analytical methods is very low. For example, typical HPLC instruments need 10-20 ?l of solution per injection. Greater than 99% of prepared solutions are typically disposed of without being used. When using Quantos, the amount of substance is no longer determined by volumetric flasks but by the minimum weight of the balance. Therefore in the example savings [link widoczny dla zalogowanych] of greater than 90% of substance and solvent can be realized. Substance and solvent can now be dispensed directly into the target vessel with unprecedented speed and accuracy eliminating the associated expense of [link widoczny dla zalogowanych] glassware management and wasted [link widoczny dla zalogowanych] stock solutions.
Out-of-specification results in an analytical laboratory require significant resources and time to resolve. Questions that arise are: was the correct flask used, was the calculation and transcription done correctly, was the [link widoczny dla zalogowanych] meniscus aligned with the mark? Automating the solution preparation process using Quantos gravimetric dispensing technology will reduce the potential sources of error and thereby reduce the risk of [link widoczny dla zalogowanych] out-of-specification results.
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