Quality Assurance

Pre-Barcoded Labware | Ceramic ID | Laser Etched ID | Pre-Tared Labware

Certificate of Quality Assurance
I. 100% Quality Control
    Each barcoded and barcoded/tare weighed labware will be:
  1. Scanned for readability.
  2. Checked to ensure zero invalid barcodes (such as omissions).
  3. Checked to ensure zero barcode duplication for each customer’s entire order history with TWD.
  4. Checked to ensure zero tare weight duplication for each customer’s entire order history with TWD.
II. Labware Weighing Accuracy and Precision
      Each tare weighed labware is produced under the following production tolerances and procedures:
  1. The balances used to produce tare weights are calibrated annually by balance manufacturers.
  2. Tare weights are cross-checked on two different balances to ensure tare weight accuracy.
Decimal places Container weight (g) Balances are calibrated
2 >150 +/- 0.02
3 50-150 +/- 0.002
4 <50 +/- 0.0002


III. Convenient and Traceable Packaging
       Every packaged unit has:
  1. A label stating the starting and ending barcode numbers for that packaged unit.
  2. A label indicating the starting barcode location and the barcode ascending direction.
IV. Reference of Chemical Compatibilities and Caustic Conditions
       The Reference Sheet below lists all solvents and conditions used to show the chemical compatibilities
       of the ceramic barcoded glass labware. The results should be used as a reference. Individuals may
       design and conduct tests based on their applications.

  1. Temperature Tests

    2. 1.1 Liquid Nitrogen Test
           Store in liquid nitrogen for 24 hours
           Shift to room temperature
           Repeat for a total of 3 cycles
    1.2 -80ºC Test
           Store vials at -80ºC (-112ºF) for 1 year (test ongoing)
    1.3 590ºC Test
           Heat labeled vials to 590ºC (1100ºF) for 20 minutes
           Cool down to room temperature
           Repeat for a total of 3 cycles

RESULTS: No visible changes observed. No effect on bar code readability

  • Chemical Resistance Tests

    • Immerse ceramic bar-coded glass labware in the following chemicals for a few seconds then
    remove the labware and forcefully rub ceramic label.
           DMSO
           Methylene chloride
           Ethyl acetate
           Hexane
           DMF
           DMF/NMP (N-methylpyrrolidinone)
           Toluene
           Ethanol
           HCl (concentrated)
           NaOH 5M
           Nitric Acid
           TFA
           THF

    RESULTS: No visible changes observed. No effect on bar code readability


  • Sonication Test

    • Immerse labeled vessel in water. Sonicate for 30 minutes.

    RESULTS: No visible changes observed. No effect on bar code readability

  • Ultraviolet Light Test

    • Expose labeled containers to high intensity short wave (254 nm) and long wave (366 nm) UV light
    for 5 days each at a distance of 6 inches.

    RESULTS: No visible changes observed. No effect on bar code readability





    Pre-Barcoded Labware | Ceramic ID | Laser Etched ID | Pre-Tared Labware