Description
Buffer pH=9.21 is a ready-to-use pH calibration solution packed in sealed-edge sachets for reliable single-portion laboratory work. Each pack holds 30 sachets of 20 mL, offering a convenient supply for regular sensor and meter calibration without large open bottles. At 25 °C the buffer is specified at pH 9,21 with an accuracy of ±0,02 pH, giving a well-defined alkaline calibration point for pH electrodes. NIST traceability and a quality certificate support reproducible results and documented quality systems. Supplied in this sachet format by manufacturer Mettler-Toledo OnLine, the product helps preserve solution integrity until use and limits contamination or carry-over between calibrations. Primary use is the calibration of pH sensors across analytical chemistry, quality control, process monitoring and teaching laboratories. The sealed-edge pouches are easy to handle, store and transport, and the 20 mL fill volume aligns with typical calibration procedures. Net and gross package weight is 0,719 kg. Laboratories seeking fresh buffer aliquots, clear alkaline pH specification and straightforward traceability will find this pack format practical for daily electrode maintenance and verification.
This article is part of pH buffers & conductivity standards, in Buffers & pH solutions.
Key features
- Pack size: 30 × 20 mL sachets
- pH value: 9,21 (at 25 °C)
- Accuracy: ±0,02 pH
- Traceability: NIST
- Quality certificate: yes
- Technical Information Sheet:
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Questions about Techn. Buffer pH 9.21 sachets 30x20mL
What is this article?
Techn. Buffer pH 9.21 sachets 30x20mL is the article on this page. Luminix Health distributes Mettler-Toledo OnLine for laboratory use. It sits in pH buffers & conductivity standards, inside Buffers & pH solutions, in Lab chemicals.
A pH buffer for calibration has a stated pH at a stated temperature, often traceable. A conductivity standard has a stated conductivity. They are not general reagents and they should not be poured back into the bottle. The temperature of the measurement has to be the temperature on the label, or the meter has to compensate.
A buffer resists a change in pH when a little acid or base is added. It does that because a weak acid and its conjugate base are both present. A pH buffer used to calibrate a meter has a stated value at a stated temperature. A biological buffer such as Tris or HEPES is chosen because it holds the pH of a living system and does not poison it. Conductivity standards are the sister articles for a conductivity meter. The ions are on PubChem. Electrode calibration practice sits with EURAMET and BELAC.
Which category should I open next?
The category is Buffers & pH solutions. The sub-category is pH buffers & conductivity standards. The catalogue is Lab chemicals.
Shelves beside this one are Biological buffers (Tris, HEPES, MOPS) and Buffers (other).
What should I check before I order?
When this page shows a safety data sheet, use that manufacturer file. Hazard text does not belong in the sales description. For a pack size, a grade or a certificate that is not on the page, send a quote request or contact the team.
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Luminix Health distributes this article from the heart of Europe. Delivery across Europe, two to five days when in stock. Standard delivery is free from €250 excl. VAT. Cold-chain goods and dangerous goods under ADR are never included in that free delivery. The terms are in the Shipping Policy. The full brand index is on shop by brand. Who we are is on about us.
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