[Prep Lab Students] Spring 2026- Week 9

[Weaver, Tyler]

The Weekly Mix
Volume: Spring 2026 | Edition: Week 9
Schedule

Spring break is next week! We do not anticipate the prep lab being open for student employees over spring break. Please take some time to rest and recharge.

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Experimental Details

Review the window notes and any associated equipment guides for additional details. Please refer the Week 8 edition<https://lists.osu.edu/pipermail/preplabstudents/2026-March/000341.html> for details on STO and SAL.

CAR
TAs will be picking up glucose test strips from the windows. These are light and moisture sensitive and are kept in the desiccators on the bench within the lab support window. To open the desiccator, unlatch the three latches and swing the door open. Do the reverse to close the desiccator. Let us know if you have any trouble.
The glucose test strips are expensive, so we WILL accept unused strips back. Please place these back into the desiccator in the pink “EXTRAS” bag. These should only be handed out if extras are needed. Never give a TA a partial set. They should be picking up a full class set at the beginning of the lab session.
LLT

Blue square carboys of 0.44 M NaOH will be swapped out during the lab readiness checks by those completing them. When swapping out the blue carboys, check the fill level of the spill tray. Let us know if it’s more than half full. Partially filled bottles of lemon and lime juice should be placed in the fridge. We will periodically combine these and mark their caps with a line. When doing a gather, please check the fridge first for full bottles of lemon and lime juice. If you need more than what is available in the fridge, please grab new bottles from aisle 28. No partial bottles of lemon or lime juice should be left in aisle 28. Unopened bottles of lemon and lime juice (should have unmarked caps) from cart checks should be placed back on the shelf in aisle 28.

EMS

These will be set up on the bench beside Hood A. Replacement parts are available in the window. The power supplies and discharge tubes are new, but the spectrometers are the same.

SST

If a lab indicates they don’t have enough meters and probes, be sure they are planning to work in pairs. pH meters, probes, and cables to connect the two, are on the bench closest to Hood A.

There could be a few rooms with old (black cable) probes, most rooms will have new (white wire) probes. The probes with the black cables will need to be attached to the top of the meters whereas the new white wire probes will need to be attached to the probe and meter via the white wire.

Connections are made on the top of the meter by pushing and turning (BNC type). Both pH probe types will have either a black o-ring or blue rubber piece at the top of the probe shaft to cushion it from the glass storage tube and help seal in the storage solution. These should stay at the top of the probes while the students are taking readings.

If a student claims their pH meter is “broken”, they should have their TA try to calibrate it before bringing it to the window for an exchange. Emma has prepared a guide on how to handle pH meter issues; everyone is required to review it and initial the roster on the wall by Keyth. It will be available in the window and the prep lab office.

HCAL

Students and TAs have been instructed to use a program called Graphical Analysis. It can be downloaded from go.osu.edu/graphicalanalysis.

GoTemp! Probes are on the bench by Hood A. USB adapters are also available, if needed. Sarah, Emma, or I will take care of the unknown environment which will be setup in Hood A. All metals and the battery prototypes will be on the reagent cart.

CLK

Extra thermometers and replacement batteries will be in the window. This one usually uses a bunch of spill kits. Keep a close eye on your spill kits and request replacements as needed. The window playbook has been updated with guidance on when to replace lab coats that have reagents spilled on them- please review it.

Other Information

Gathers

We saw several errors with gathers this week. The incorrect concentration or incorrect volume was pulled. Please be sure you are paying attention to these details when gathering materials. This can have a big impact on the students’ experiments.

Eyewash Testing

We’re going to transition eyewash testing to be a One-An-Hour option for Mondays, Wednesdays, and Thursdays. Two rooms will count for one hour. We have a green laminated sheet on the Daily Sheet board. Please cross out completed rooms so we know what still needs to be completed. If you have any questions, please speak with Sarah, Emma, or Tyler.

Discrimination and Harassment Training

The deadline to complete this is fast approaching! You have until the beginning of spring break to complete this training module. As of right now, only about half of our students have done so….

General Chemistry Prep Lab • Department of Chemistry and Biochemistry • THE Ohio State University
preplabstaff at lists.osu.edu<mailto:preplabstaff at lists.osu.edu>

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