INDUSTRY COMPONENT

Internal Buffer Solution

Internal buffer solution for glass electrodes, providing stable pH reference potential in electrochemical measurements.

View Specifications

Component Specifications

Definition
An internal buffer solution is a precisely formulated aqueous solution contained within the glass electrode body, serving as the reference system for pH measurement. It maintains a constant ionic concentration and electrical potential against which the external sample's hydrogen ion activity is measured through the pH-sensitive glass membrane.
Working Principle
The internal buffer solution establishes a stable reference potential via a silver/silver chloride (Ag/AgCl) or calomel electrode immersed in it. This reference potential remains constant while the glass membrane potential varies with external pH, creating a measurable potential difference proportional to pH according to the Nernst equation.
Materials
Aqueous solution containing potassium chloride (KCl) at 3M or 4M concentration, buffered to pH 7.00 ± 0.02 with phosphate or other buffer systems, saturated with silver chloride (AgCl) for reference electrode compatibility.
Technical Parameters
  • pH 7.00 ± 0.02
  • Shelf Life 12-24 months
  • Conductivity >100 mS/cm
  • KCl Concentration 3M or 4M
  • Temperature Range 0-80°C
Standards
ISO 15193, DIN 19266, ASTM E70

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Internal Buffer Solution.

internal buffer solution glass electrode buffer pH reference solution electrochemical buffer Ag/AgCl reference KCl buffer solution pH measurement Internal Buffer Solution in Chemical Manufacturing

Parent Products

This component is used in the following industrial products

Glass Electrode

A specialized sensor component within a pH monitoring probe that generates an electrical potential proportional to hydrogen ion concentration.

View Product Details

Engineering Analysis

Risks & Mitigation
  • Solution evaporation altering concentration
  • Silver chloride precipitation clogging junctions
  • Microbial growth in unbuffered solutions
  • Chemical contamination from improper handling
FMEA Triads
Trigger: Evaporation through porous junctions
Failure: Increased KCl concentration shifts reference potential
Mitigation: Use sealed electrodes with gelified buffers or regular maintenance
Trigger: Silver chloride depletion
Failure: Unstable reference potential and measurement drift
Mitigation: Ensure AgCl saturation and use fresh solutions
Trigger: Contamination from sample back-diffusion
Failure: Altered buffer pH and ionic strength
Mitigation: Proper electrode storage in KCl solution and regular calibration

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
pH ±0.02, conductivity ±5%
Test Method
Potentiometric measurement against NIST-traceable buffers, conductivity meter verification

Buyer Feedback

★★★★☆ 4.5 / 5.0 (15 reviews)

"Great transparency on the Internal Buffer Solution components. Essential for our Chemical Manufacturing supply chain."

"The Internal Buffer Solution we sourced perfectly fits our Chemical Manufacturing production line requirements."

"Found 15+ suppliers for Internal Buffer Solution on CNFX, but this spec remains the most cost-effective."

Related Components

In-line Analyzer Port
In-line analyzer port for real-time chemical composition monitoring in continuous flow reactors
Seeding Port
A precision port for introducing seed crystals into batch crystallization systems to initiate controlled crystal growth.
Sight Glass
A transparent window for visual inspection of fluid flow and crystallization processes in industrial systems.
Control Software
Specialized software for real-time monitoring and control of continuous flow pharmaceutical reactors, ensuring precise process parameters and regulatory compliance.

Frequently Asked Questions

Why is KCl used in internal buffer solutions?

Potassium chloride provides high ionic conductivity, minimizes liquid junction potentials, and ensures stable reference electrode performance with minimal temperature dependence.

How often should internal buffer solution be replaced?

Typically every 12-24 months or when electrode performance drifts, as evaporation or contamination can alter concentration and pH.

Can different buffer pH values be used internally?

pH 7.00 is standard for symmetrical electrode design; some specialized electrodes use pH 4.01 or 9.21 buffers for specific measurement ranges.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Get Quote for Internal Buffer Solution

Interface layer Internal Ladders & Platforms