Pierce™ Dilution-Free™ BSA Protein Standards, Multichannel Pipette Compatible, 0.125-10 mg/mL, 8-channel tubestrip (2 x 1 mL) - FAQs

Yes, we offer the Pierce Dilution-Free BSA Protein Standards, Multichannel Pipette Compatible in two versions:
- Cat. No. A56979 (0.125-10 mg/mL) for the Pierce Dilution-Free Rapid Gold BCA Protein Assay Kit (Cat. No. A55860, A55861, A55862)
- Cat. No. A55863 (0.125-2 mg/mL) which is compatible with the Pierce BCA Protein Assay Kit (Cat. No. A55864, A55865) and with most protein assays that have a working range between 0-2 mg/mL

Find additional tips, troubleshooting help, and resources within our Protein Assays and Quantitation Support Center.

The Pierce Dilution-Free BSA Protein Standards, Multichannel Pipette Compatible is dissolved in 0.9% saline (sodium chloride) containing 0.05% sodium azide.

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The BSA in the Pierce Dilution-Free BSA Protein Standards, Multichannel Pipette Compatible (Cat. No. A55863 and A56979) is identical to the BSA found in Pierce Bovine Serum Albumin Standard Ampules, 2 mg/mL (Cat. No. 23209) and the Pierce Bovine Serum Albumin Standard Pre-Diluted Set (Cat. No. 23208).

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Pierce Dilution-Free BSA Protein Standards are provided in a convenient 8-channel tubestrip. Each tube contains 1 mL of pre-diluted BSA protein standard at each concentration required for generating a standard curve.
- Pierce Dilution-Free BSA Protein Standards, Multichannel Pipette Compatible, 0.125-2 mg/mL (Cat. No. A55863) includes BSA concentrations of 2000, 1500, 1000, 750, 500, 250, and 125 µg/mL.
- Pierce Dilution-Free BSA Protein Standards, Multichannel Pipette Compatible, 0.125-10 mg/mL (Cat. No. A56979) contains BSA concentrations of 10000, 5000, 2000, 1000, 500, 250, and 125 µg/mL.

Each tubestrip contains one empty tube which allows the user to add their own blank solution for the purpose of background correction. This convenient format eliminates the time-consuming dilution step required for other single-concentration protein standard formats like the Pierce Bovine Serum Albumin Standard Ampules, 2 mg/mL (Cat. No. 23209) or Pierce Bovine Serum Albumin Standard, 2 mg/mL (Cat. No. 23210).

Additionally, the tubestrips are compatible with multichannel pipettes which allows the user to easily transfer the full standard curve dilution series (including blank) to a microplate simultaneously. This minimizes setup time associated with traditional pre-diluted protein standards which are typically packaged in 7 separate vials, requiring the user to open each vial and pipette each standard individually.

Find additional tips, troubleshooting help, and resources within our Protein Assays and Quantitation Support Center.

We offer BSA protein standards at a concentration of 2 mg/mL in two different pack sizes:
10 x 1 mL in sealed glass ampules (Cat. No. 23209)
50 mL in a plastic bottle (Cat. No. 23210)

We also offer a Pre-Diluted Set of BSA standards in individual plastic vials which contain 3.5 mL of BSA protein standard per vial (Cat. No. 23208) with BSA concentrations of 2000, 1500, 1000, 750, 500, 250, and 125 µg/mL.

Find additional tips, troubleshooting help, and resources within our Protein Assays and Quantitation Support Center.

To ensure that the BSA standards remain free of contaminants, we recommend minimizing the time the tubestrips are uncovered/uncapped. Immediately place the capstrip over the tubes after each use. Be sure to press the caps firmly when closing so that it fits snugly. Store the Pierce Dilution-Free BSA Protein Standards, Multichannel Pipette Compatible at 4 degrees C.

Find additional tips, troubleshooting help, and resources within our Protein Assays and Quantitation Support Center.

For Pierce Dilution-Free BSA Protein Standards, Multichannel Pipette Compatible, the tubestrip has a single printed label on the top-center of the first tube indicating the tube containing the 2 mg/mL concentration (for Cat. No. A55863) or 10 mg/mL concentration (for Cat. No. A56979). Each subsequent tube contains the next highest concentration in the dilution series. The end-tube opposite the printed label is left empty to allow the user to add their own blank solution for the purpose of background correction. On the capstrip, there is a small hole at one end that can be used to orient the caps. When placing the caps on the tubestrip, we recommend aligning the hole-side of the capstrip with the labeled side of the tubestrip.

Find additional tips, troubleshooting help, and resources within our Protein Assays and Quantitation Support Center.

To access the BSA standards, hold one side of the tubestrip firmly and carefully pull the foil seal to remove it from the tubestrip. The standards come with a capstrip for convenient closing and storage between uses.

Find additional tips, troubleshooting help, and resources within our Protein Assays and Quantitation Support Center.

The Pierce Dilution-Free BSA Protein Standards, Multichannel Pipette Compatible are covered under our general 1-year warranty and are guaranteed to be fully functional for 12 months from the date of shipment if stored as recommended. The product should be stored at 4 degrees C after opening. Please see section 8.1 of our Terms & Conditions of Sale (https://www.thermofisher.com/content/dam/LifeTech/Documents/PDFs/Terms-and-Conditions-of-Sale.pdf).

Find additional tips, troubleshooting help, and resources within our Protein Assays and Quantitation Support Center.

The Pierce Dilution-Free BSA Protein Standards, Multichannel Pipette Compatible, 0.125-10 mg/mL is currently only recommended for use with the Pierce Dilution-Free Rapid Gold BCA Protein Assay. We have not validated its use with other assays.

Find additional tips, troubleshooting help, and resources within our Protein Assays and Quantitation Support Center.