For pH buffers, check the pH value and the temperature it is stated at (most here are specified at 25 °C), the tolerance, and whether the lot is traceable to a reference standard if your quality system requires it. Color-coded buffers, such as red for pH 4, yellow for pH 7 and blue for pH 10, help avoid mix-ups during calibration. Sizes run from 500 mL bottles to 4 L bottles and 10 L and 20 L Cubitainers, so buy a size you will use before the expiration date. Electrode storage solution, offered in several sizes, keeps pH electrodes ready between uses.
Buffers and Solutions: common questions
What is 1,10-phenanthroline used for?
1,10-Phenanthroline is an organic compound that forms an intensely colored orange-red complex with ferrous iron, which is the basis of a common colorimetric method for measuring iron in water and other samples. The iron complex, known as ferroin, is also used as a redox indicator in titrations. It is sold as the monohydrate or anhydrous form, so check which one your method calls for.
How long do pH buffer solutions last once opened?
An unopened buffer is good until the manufacturer's expiration date. Once opened, buffers can change as they absorb carbon dioxide from the air or become contaminated, and alkaline buffers such as pH 10 are affected most. Pour what you need into a clean container, never return used buffer to the bottle, keep it capped, and replace it if calibration results drift.
What is the difference between a buffer and a reagent?
A buffer is a solution that resists changes in pH when small amounts of acid or base are added, usually a weak acid or base mixed with its salt. A reagent is any substance used to cause or measure a chemical reaction. Buffers are a kind of reagent used to hold pH steady in analyses, biological work and instrument calibration.
Shop by type: pH Buffers · Blends
Top brands: Reagents Inc · LabChem · Spectrum Chemical
Popular Buffers and Solutions:
Buffers and Solutions
-
Formaldehyde, Solution, Reagent, ACS, 1L, CAS# 50-00-0SKU: F1080-1LT-EAManufacturer: Spectrum ChemicalFormaldehyde, Solution, Reagent, ACS is also known as methanal and is the simplest aldehyde. It is used in industrial application for the production of different types of formaldehyde-based resins, a tissue fixative and as a fixative in microscopy and histology. As an ACS grade Reagent, Spectrum Chemical manufactured formaldehyde solution is used as the quality standard against which other substances are grade and has met the toughest regulatory standards for quality and pureness. (1 per EA )Learn Morewas $222.10 Special Price $133.04 -
Formaldehyde, 10 Percent (v/v) Solution, Stabilized with approx. 3 Percent Methanol, Histological Grade00-0SKU: HS008-4LT-EAManufacturer: Spectrum ChemicalFormaldehyde, 10 Percent (v/v) Solution, Stabilized with approx. 3 Percent Methanol, Histological Grade is used as an embalming and tissue fixative. as well as a nail hardener and in nail polish. It is not intended for and should not be (i) used for medical, surgical or other patient oriented applications, or (ii) combined with any food product or ingested in any form. (1 per EA )Learn Morewas $474.10 Special Price $420.84 -
Acetate Buffer, 1 LSKU: A1000-1L-EAManufacturer: 710 Spirits Rocky Mtn ReagentsChlorine; Standard Methods (1 per EA)Learn More$46.20 - Acetic Acid, 3% v/v Solution, 1 LSKU: A1005-1L-EAManufacturer: 710 Spirits Rocky Mtn ReagentsAcetic Acid, 3% v/v Solution, 1 L (1 per EA)Learn More$19.05
- Hydrochloric Acid, 10 Normal, 1 L, PolySKU: CF1228-1L-EAManufacturer: 710 Spirits Rocky Mtn ReagentsHydrochloric Acid, 10 Normal, 1 L, Poly (1 per EA )Learn More$50.80
- Dimethylglyoxime, 1% w/v in Denatured Ethanol, 120 mLSKU: D1002-120mL-EAManufacturer: 710 Spirits Rocky Mtn ReagentsDimethylglyoxime, 1% w/v in Denatured Ethanol, 120 mL (1 per EA)Learn More$43.40
-
Formaldehyde, Technical, CAS# 50-00-0SKU: F1011-1gal-EAManufacturer: 710 Spirits Rocky Mtn ReagentsAssay: 37% Minimum; Stabalized with Methanol (1 per EA)Learn More$22.10 - Hydrochloric Acid, 10% v/v Solution, 1 LSKU: H1014-1L-EAManufacturer: 710 Spirits Rocky Mtn ReagentsHydrochloric Acid, 10% v/v Solution, 1 L (1 per EA)Learn More$20.95
- Hydrochloric Acid, 0.01 Normal, 3.8 L, Poly GallonSKU: H1018-3.8L-EAManufacturer: 710 Spirits Rocky Mtn ReagentsN/100 (0.01 M) (1 per EA)Learn More$36.90
- Hydrochloric Acid, 17% w/w Solution, 1 L, PolySKU: H1073-1L-EAManufacturer: 710 Spirits Rocky Mtn ReagentsHydrochloric Acid, 17% w/w Solution, 1 L, Poly (1 per EA )Learn More$43.05
- Potassium Chloride, 3 Molar, 500 mL, PolySKU: P1034-500mL-EAManufacturer: 710 Spirits Rocky Mtn ReagentsPotassium Chloride, 3 Molar, 500 mL, Poly (1 per EA)Learn More$24.30
- Potassium Dichromate, 0.1 Normal, 1 L, PolySKU: P1037-1L-EAManufacturer: 710 Spirits Rocky Mtn ReagentsN/10 (0.05 M) (1 per EA)Learn More$22.85
- Potassium Hydroxide, 20% w/v Solution, 500 mLSKU: P1044-500mL-EAManufacturer: 710 Spirits Rocky Mtn ReagentsCaustic Potash; Potassium Hydrate (1 per EA)Learn More$24.10
-
Starch Indicator, 0.5% w/v Solution, 120 mLSKU: S1012-120mL-EAManufacturer: 710 Spirits Rocky Mtn ReagentsPotato Starch; Stabilized with Salicylic Acid (1 per EA)Learn More$14.65 - Sodium Chromate, 2% w/v Solution, 500 mL, PolySKU: S1020-500mL-EAManufacturer: 710 Spirits Rocky Mtn ReagentsChromic Acid, Disodium Salt, Tetrahydrate (1 per EA)Learn More$26.20
- Sulfuric Acid, 50% v/v Solution, 500 mLSKU: S1067-500mL-EAManufacturer: 710 Spirits Rocky Mtn ReagentsSulfuric Acid, 50% v/v Solution, 500 mL (1 per EA)Learn More$25.75
- Sodium Hydroxide, 2.5 Normal, 1 L, PolySKU: S1084-1L-EAManufacturer: 710 Spirits Rocky Mtn ReagentsSodium Hydroxide, 2.5 Normal, 1 L, Poly (1 per EA)Learn More$24.60
- Starch Indicator, 2% w/v Solution, 1 LSKU: S1134-1L-EAManufacturer: 710 Spirits Rocky Mtn ReagentsPotato Starch; Stabilized with Salicylic Acid (1 per EA)Learn More$23.40
- Triethanolamine, 40% v/v Solution, 1 L, Amber PolySKU: CF1296-1L-EAManufacturer: 710 Spirits Rocky Mtn ReagentsTriethanolamine, 40% v/v Solution, 1 L, Amber Poly (1 per EA )Learn More$91.85
- Potassium Fluoride, 20% w/v Solution, 3.8 L, Poly GallonSKU: P1064-3.8L-EAManufacturer: 710 Spirits Rocky Mtn ReagentsPotassium Monofluoride, Dihydrate (1 per EA)Learn More$134.35
- Potassium Fluoride, 50% w/v Solution, 1 L, PolySKU: P1082-1L-EAManufacturer: 710 Spirits Rocky Mtn ReagentsPotassium Monofluoride, Dihydrate (1 per EA)Learn More$96.70
- Triethanolamine, 50% v/v Solution, 1 L, Amber PolySKU: T1029-1L-EAManufacturer: 710 Spirits Rocky Mtn ReagentsTEA (1 per EA)Learn More$88.95
-
Silver Nitrate, 0.2 N, 1.00 L Glass amberSKU: CS139500-1C-EAManufacturer: Reagents IncSilver Nitrate, 0.2 N, 1.00 L Glass amber (1 per EA )Learn Morewas $531.00 Special Price $398.52 - Buffer, pH 6.86, 500.00 mL Poly naturalSKU: C2155555-500A-EAManufacturer: Reagents IncBuffer, pH 6.86, 500.00 mL Poly natural (1 per EA )Learn Morewas $29.00 Special Price $21.60
How Can We Help?
This is a custom sub-title.
LPS provides procurement services:
Strategic and customized product sourcing services to find the best vendorsUnparalleled customer service from dedicated procurement managers
Custom web portal where you can order items from any vendor on one site
Consolidate orders and invoices
Wholesale “club” pricing for members
Procure-to-Pay software solutions and process consulting
Enterprise procurement solutions designed for small and mid-sized labs