Ohaus pH Buffer Solution and Powder

Ohaus pH Buffer Solutions and Powder Set

Ohaus pH buffer solutions and powder provide factory-certified pH calibration standards essential for establishing accurate electrode slope and zero point across diverse pH measurement applications. Available in seven precisely formulated buffer strengths—pH 1.68, 4.01, 6.86, 7.00, 9.18, 10.01, and 12.45—supplied in convenient 250ml bottles, plus a pH Buffer Powder Set (4.01, 7.00, 10.01) for preparing fresh solutions, these temperature-compensated standards ensure reliable pH meter calibration and measurement accuracy.

Each buffer solution is factory-packaged with a Certificate of Analysis and includes temperature compensation tables for validation across a range of calibration temperatures, accommodating the temperature-dependent pH values that vary from manufacturer to manufacturer. Proper calibration protocol requires at least 2-point calibration with pH 7 buffer as one calibration point, with buffers differing by at least two pH units and bracketing the expected sample pH range—for example, using pH 4.01 and 7.00 buffers for acidic samples, or pH 7.00 and 10.01 for basic samples. For measurements spanning large pH ranges, 3-point calibration is recommended to accurately determine electrode slope beyond just the zero point.

Fresh, unused, unexpired buffers are critical as contamination from previous use causes slow electrode response, calibration failure, and measurement errors—expired buffers (especially basic solutions exposed to atmospheric CO₂) and reused buffers should never be employed. Expiration dates are clearly printed on buffer bottle labels with LOT code traceability available at ohaus.com/Lot-Certificates, ensuring quality assurance and regulatory compliance for laboratories requiring traceable pH measurement standards in pharmaceutical, environmental, food and beverage, chemical, and research applications.

Features of Ohaus pH Buffer Solution and Powder:

• 1 Year Warranty: Factory Certification with Quality Assurance - Each buffer solution supplied with Certificate of Analysis, LOT code traceability, and clearly printed expiration dates ensuring regulatory compliance and measurement confidence.
• Seven pH Buffer Strengths - Comprehensive range (pH 1.68, 4.01, 6.86, 7.00, 9.18, 10.01, 12.45) in 250ml bottles brackets complete pH scale for acidic, neutral, and basic sample calibration requirements.
• Buffer Powder Set Option - pH Buffer Powder Set (4.01, 7.00, 10.01) enables preparation of fresh buffer solutions ensuring optimal calibration performance and eliminating contamination from pre-mixed solutions.
• Temperature Compensation Tables - Included temperature compensation data accommodates pH value temperature dependence, enabling accurate calibration across varying laboratory conditions and sample temperatures.
• Bracketed Calibration Support - Buffer strengths strategically selected to bracket expected sample pH ranges with minimum two pH unit separation, ensuring accurate electrode slope determination and measurement linearity.
• Traceable Quality Standards - LOT-specific Certificates of Analysis accessible at ohaus.com/Lot-Certificates provide complete traceability, batch documentation, and quality verification for regulated laboratory environments.

Applications for Ohaus pH Buffer Solution and Powder:

• pH Meter Calibration and Verification - Essential 2-point and 3-point calibration of laboratory pH meters, benchtop meters, and portable instruments ensuring accurate electrode slope, zero point determination, and measurement reliability across pH ranges.
• Quality Control and Regulatory Compliance Testing - Traceable, certified buffer solutions support quality management systems, ISO/IEC 17025 accreditation, GLP compliance, and regulatory requirements in pharmaceutical, environmental, and food testing laboratories.
• Routine Electrode Maintenance and Performance Verification - Weekly electrode performance checks, calibration verification, and quality control procedures ensuring continued measurement accuracy between formal recalibration intervals.
• Method Development and Validation - Bracketed buffer calibration across expected sample pH ranges supports analytical method development, validation protocols, and measurement uncertainty calculations in research laboratories.
• Multi-User Laboratory Standardization - Factory-certified buffers with temperature compensation tables ensure consistent calibration practices, reduce operator variability, and maintain measurement comparability across multiple users, instruments, and shifts in busy laboratory environments.

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