Lab sample log sheet
A blank log for each sample you prepare: date, material, gross mass, solvent, volume, nominal and corrected concentration, container, storage and initials.
PDF · 1 page, landscape · US Letter
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Free printable lab sheets
Four blank PDF sheets for keeping tidy laboratory records. Print them, copy them, share them with your group. There is no email gate: each file downloads directly.
Storage and temperature log
A month of blank rows for temperature readings, minimum and maximum, door openings and excursions, plus a freeze-thaw record for individual portions.
PDF · 2 pages, portrait · US Letter
Download PDF Concentration worksheet
Blank boxes for the arithmetic behind a solution: concentration from mass and volume, solvent volume for a target, aliquot volume and molarity. The formulas are printed; every number is yours.
PDF · 1 page, portrait · US Letter
Download PDF Vial inventory sheet
A blank inventory of vials on hand: ID, material, stated size, date received, storage location, date opened, status and notes.
PDF · 1 page, landscape · US Letter
Download PDFHow the sheets are meant to be used
- Every field is blank. The sheets contain no amounts, no suggested values and no instructions for use of any material.
- Keep one log per balance, freezer or refrigerator so that a record can be traced to the equipment that produced it.
- Write the unit next to every number. Most arithmetic mistakes in a notebook are unit mistakes.
- The concentration worksheet prints the formulas only. The concentration calculator and the other tools below do the same arithmetic on screen.
Related tools and reading
Solution concentration calculatorConcentration from sample mass and solvent volume, solvent volume for a target concentration, and aliquot volume from a known concentration. mg, µg, mL, µL and mM.Molarity and mole calculatorMass to amount of substance, amount to mass, molarity from mass and volume, and the mass needed for a target molarity. Uses a molecular weight you enter.Dilution and serial dilution calculatorSolve C1 × V1 = C2 × V2 for whichever value is missing, or lay out a multi-step serial dilution with transfer and solvent volumes for every tube.Peptide molecular weight estimatorAdd up average and monoisotopic residue masses plus water for a sequence you type. An estimate for linear sequences, with optional terminal changes and disulfide bonds.Purity and net peptide content calculatorPeptide mass in a weighed powder from a net peptide content and purity you enter, the gross mass to weigh for a target mass, and nominal against corrected stock concentration. Laboratory glossaryShort definitions of the terms used on the sheets and in the guides. Peptide stability and degradationWhy temperature, moisture and freeze-thaw cycles are worth logging. Purity vs net peptide contentWhat the corrected-concentration column on the sample log refers to.
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For laboratory research use only. Not for human or veterinary use. These sheets are record-keeping aids provided as is; they are not a substitute for your institution's own procedures and requirements.