Pickering Laboratories


Li220 & Na220


img-generic2Li220 & Na220

Chromatographic Grade™ Samples and Standards Diluents for Amino Acid Analysis

Use of these diluents is essential to ensuring reproducibility from injection to injection. They establish a uniform pH and ion concentration at the outset, regardless of the source and pre-treatment of the sample. The sample is maintained buffered and at optimum pH for sample storage and analysis.

Use Li220 for prepared physiological samples and to dilute amino acid calibration standards for use with Lithium columns and buffers. Use Na220 for hydrolysate samples and to dilute amino acid calibration standards for use with Sodium columns and buffers.



Pricing & Ordering


Pricing & Ordering

Li220 & Na220 CATALOG INFORMATIONLogin for Prices

Catalog #




Lithium Diluent, pH 2.36, 4 x 250 mL

case (4 x 250 mL/bottle)


Sodium Diluent, pH 2.20, 4 x 250 mL

case (4 x 250 mL/bottle)








Retention Times

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Open for Business: COVID-19 Update

With the increasingly lengthy disruptions to daily life caused by COVID-19, Pickering Laboratories, Inc. wants to continue reassuring our customers that we remain open for business this summer.  We continue to maximize support for our customers and provide essential businesses with the reagents and supplies necessary to operate, including hospitals, clinical laboratories, food safety and environmental testing facilities.

Our inventory levels and response times remain normal.  Responsiveness is subject to change and new orders still may need to be prioritized accordingly to supply essential businesses. 

Thank you for your patience and for your business as we continue to work together through this difficult time.  Please contact us with any questions you may have.

Customer Service: orders@pickeringlabs.com
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Phone: 650-694-6700