1.07294

Buffer solution

di-sodium hydrogen phosphate/potassium dihydrogen phosphate, traceable to NIST, traceable to PTB, pH 6.88 (20 °C), Certipur^®

• Synonym(s): di-sodium hydrogen phosphate/potassium dihydrogen phosphate buffer, pH 6.88 calibration standard solution
• UNSPSC Code: 12161706
• NACRES: NA.25

Properties

• grade: certified reference material
• Quality Level: 300
• agency: traceable to NIST; traceable to PTB
• product line: Certipur^®
• composition: di-sodium hydrogen phosphate/potassium dihydrogen phosphate
• pH: 6.88 (20 °C)
• application(s): environmental; food and beverages; general analytical; industrial qc; pharmaceutical
• format: mixture
• storage temp.: 15-25°C

Description

General description

Certipur^® buffer solution [di-sodium hydrogen phosphate/potassium dihydrogen phosphate buffer; pH 6.88 (20 °C)] is intended for use as a calibration standard for pH instruments or pH electrodes or as a control sample for measuring the pH value.

The ready-to-use Certipur^® buffer solutions are prepared gravimetrically in our ISO/IEC 17025 accredited calibration laboratory from high-purity salts, acids and bases diluted in high-purity water. All balances are regularly calibrated with analytical weight sets traceable to primary standard reference materials from NIST and PTB. The pH-value is measured to the highest precision using a combined glass electrode after 5-point calibration (according to DIN 19268) against reference buffer solutions (according to DIN 19266, IUPAC, NIST, Ph.Eur. and USP).

Please visit ISO certificates and Site Quality Self-Assessments to access the current certificates of accreditation.
Download your certificate at http://www.sigma-aldrich.com to view certified values, including uncertainty and expiry date.

Application

• Catalytic green synthesis of Tin(IV) oxide nanoparticles for phenolic compounds removal and molecular docking with EGFR tyrosine kinase.: This study presents a green synthesis method for Tin(IV) oxide nanoparticles, demonstrating their efficacy in removing phenolic compounds and interacting with EGFR tyrosine kinase, which is relevant for potential cancer therapy applications (Alshahateet et al., 2024).


• In vitro inhibition of biofilm and virulence factor production in azole-resistant strains of Candida albicans isolated from diabetic foot by Artemisia vulgaris stabilized tin (IV) oxide nanoparticles.: This research explores the application of Tin(IV) oxide nanoparticles stabilized with Artemisia vulgaris in inhibiting biofilm formation and virulence factor production in drug-resistant Candida albicans, highlighting its potential in combating infections in diabetic patients (Zubair et al., 2023).


• Enhanced electrocatalytic activity of Pt-SnO(2) nanoparticles supported on natural bentonite-functionalized reduced graphene oxide-extracted chitosan from shrimp wastes for methanol electro-oxidation.: The study demonstrates the enhanced electrocatalytic activity of Tin(IV) oxide nanoparticles in methanol electro-oxidation, which is crucial for fuel cell technologies (Aryafar et al., 2023).


• KIT-5-Assisted Synthesis of Mesoporous SnO(2) for High-Performance Humidity Sensors with a Swift Response/Recovery Speed.: This research focuses on the synthesis of mesoporous Tin(IV) oxide using KIT-5 templates for developing high-performance humidity sensors, emphasizing its application in environmental monitoring and control systems (Vojisavljević et al., 2023).

Features and Benefits

• Compliant: Produced according to EP and USP guidelines
• Secure: Tested in our ISO 17025 accredited calibration laboratory
• Ready for audits: Detailed certificate of analysis for every product
• Convenient: Simply open the pack for quick, accurate pH calibration

Legal Information

CERTIPUR is a registered trademark of Merck KGaA, Darmstadt, Germany

Safety Information

• Storage Class: 12 - Non Combustible Liquids
• wgk_germany: nwg
• flash_point_f: Not applicable
• flash_point_c: Not applicable