Conductivity standards tested and ISO 17025 certified at 25 °C. Uncertainty of measurement of ± 1%. Directly traceable to N.I.S.T. Temperature dependence data is printed on the label as are lot numbers and expiry dates. Supplied in 500 ml HDPE bottle. 1.3 µS/cm in 250 ml bottle. Calibration values 84, 147, 1413, 12880 µS/cm. Control Values 1.3 - 350000 µS/cm.

Clear, Colourless pH Buffer Solutions. Tested and ISO17025 Certified at 20 °C, supplied with a detailed Certificate of Analysis which outlines traceability to N.I.S.T. Temperature dependence data is printed on the label as are lot numbers and expiry dates. Containers made of HDPE.

Certified stabilized Sucrose (Brix) Standards.

• ISO 17025 accredited
• Uncertainty of measurement of 0.11 % for all Brix values at 20 °C
• Equivalent Nominal Refractive Index values from ICUMSA published tables reported on Certificate of Analysis
• Compatible with any brand of Refractometer
• 12 month shelf life
• Provided in high quality HDPE 15 ml dropper bottles

Coloured pH buffer solutions. Tested and ISO 17025 certified at 20 °C. Uncertainty of measurement ±0.01 pH. Supplied with a detailed Certificate of Analysis which outlines traceability to N.I.S.T. Temperature dependence data is printed on the label as are lot numbers and expiry dates.

Colour coded. Tested and ISO 17025 Certified at 25 °C. Uncertainty of measurement ±0.02 pH. Temperature dependence data is printed on the label as are lot numbers and expiry dates. These pH buffer solutions are suitable for use where very accurate measurements are required and are supplied with a detailed Certificate of Analysis which outlines traceability to N.I.S.T (the N.I.S.T SRM(s) Lot No. is stated on the certificate). This item has a 12 to 36 month shelf life from date of manufacture depending on pH value.

Clear, colourless DIN value pH buffer solutions. Tested at 25 °C and certified by Reagecon's ISO 17025 accredited test method. NIST traceable and presented in 500 ml bottles.

Other pack sizes available upon request.

Cleaning, rinse, regeneration and storage solution. Designed to extend the useful life of pH electrodes.

These standards are ideal for use as control standards to verify that correct analysis for COD has taken place. Extensive range (10 to 60000 ppm), NIST traceable, 2 years shelf-life. Bottles of 500 ml.

These color standards can be used to calibrate, control, qualify or validate color measurement instruments to determine the color number. These standards can be described as Platinum-Cobalt, Pt-Co, Hazen or APHA color. All descriptions are interchangeable.

• Covers requirements of ASTM Method D 1209
• In 1 l HDPE bottle

Compatible for use on all Cryoscopes compliant to International Reference Standard ISO5764/IDF108 for the determination of Freezing Point in milk. High accuracy, 1 year shelf-life (from Date of Manufacturing). Supplied in 250 and 100ml HDPE bottle and a convenient cap with collapsible filling nozzle

For refilling or replacing reference electrolyte for electrodes, compatible with all brand of electrodes (liquid electrolyte). Supplied in an easy to use thin nozzle HDPE dropper bottle. Designed to extend the useful life of pH electrodes.

High Purity range compatible with all Melting Point Instruments. Tested on a high specification melting point apparatus. Shelf life of 3 years (from date of manufacturing). Available as Single Melting Point Standard or as a Set of 3 different Standards. Glass bottles of 1 g. Sets include 3 bottles of 1 g.

Osmolality Standards for calibration and control, compatible with all types of osmometers. Extensive range: 50 to 3000 mOsmol/kg H₂O, ISO 17025 certified. Values from 100 to 700 mOsmol/kg H₂O according to European Pharmacopoeia 2.2.35 and US Pharmacopeia 785. 12 ampoules of 5 ml each.

pH 7. In a HDPE bottle.

Certified standards with values expressed in Refractive Index (R.I) units nD.

• ISO 17025 accredited with an uncertainty of measurement up to ±0.00014 nD units at 20 °C
• 12 month shelf life
• Aqueous based
• Compatible with any brand of refractometer
• Convenient high quality 15 ml HDPE dropper bottle

Suitable for calibration, control, IQ / OQ and method validation. Compatible with all Flame Photometry Instruments. Available as single element analytical standards (in ppm) or Multi-element clinical standards (in mmol/l). NIST traceable. HDPE bottles of 500 ml.

Highly accurate turbidity standards composed of suspended microspheres, suitable for Instrument calibration and control of all turbidity meters. Stable, shelf life of 2 years (from Date of Manufacturing). NIST traceable, US EPA approved and tested in compliance with ISO 7027. HDPE bottles of 100 ml.

Two ranges available:

• Ratio range for Ratio Turbidity Measuring instruments (measure of the scattered light from the sample at a 90° angle from the incident light, plus at additional angles (several detectors)
• Non Ratio for Non Ratio Turbidity Measuring instruments will measure the scattered light from the sample at a 90° angle from the incident light (one detector)

Clear, Colourless pH Buffer Solutions. Tested at 25 °C and certified by Reagecon's ISO 17025 Accredited
Test Method. NIST traceable and presented in various pack sizes.

Indicator solutions for endpoint determination in the performance of titrations.

Suitable for manual and automatic titrations. Stability is proven (either opened or unopened) for the entire shelf life. Tested acc. to ISO17025.

Total Organic Carbon (TOC) standards are manufactured from high purity raw materials and are suitable for calibrating of TOC analysers to a high accuracy. These standards are independent, traceable and certified. TOC750P contains preservatives.

The colour standard can be used to calibrate, control, qualify or validate colour measurement instruments to determine the colour number.

• Specially for methods according to ASTM D1544, D 6166, AOCS Td 1a and MS 817 Part 10
• Suitable for similarly coloured liquids, including several vegetable and mineral oils
• In 100 ml glass bottle

Clear or coloured pH buffer solutions. Supplied in convenient Bag in Box with dispensing tap. Tested and ISO 17025 certified at 20 °C. Uncertainty of measurement ±0.01 pH. Supplied with a detailed Certificate of Analysis which outlines traceability to N.I.S.T. Temperature dependence data is printed on the label as are lot numbers and expiry dates.

Clear or coloured pH buffer solutions. Supplied in convenient Bag in Box with dispensing tap. Tested and ISO 17025 certified at 25 °C. Uncertainty of measurement ±0.01 pH. Supplied with a detailed Certificate of Analysis which outlines traceability to N.I.S.T. Temperature dependence data is printed on the label as are lot numbers and expiry dates.

All values quoted are potentials of Platinum Electrode v Ag/AgCl reference (3M KCl) at 25 °C.
Bottles of 500 ml.