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
-
Potassium Sulfate TS - 1LSKU: TS14227-1L-EAManufacturer: Dawn ScientificPotassium Sulfate TS - 1L (1 per EA )Learn Morewas $149.62 Special Price $145.88 - Triketohydrindene Hydrate TS (Ninhydrin TS) - 1LSKU: TS14299-1L-EAManufacturer: Dawn ScientificTriketohydrindene Hydrate TS (Ninhydrin TS) - 1L (1 per EA )Learn Morewas $184.62 Special Price $180.00
- Ferroxyl TS - 1LSKU: TS14414-1L-EAManufacturer: Dawn ScientificFerroxyl TS - 1L (1 per EA )Learn Morewas $94.62 Special Price $92.25
- Sodium Tetraphenylboron TS - 500mLSKU: TS14267-500ml-EAManufacturer: Dawn ScientificSodium Tetraphenylboron TS - 500mL (1 per EA )Learn Morewas $94.62 Special Price $92.25
- Potassium Acetate TS - 1LSKU: TS14212-1L-EAManufacturer: Dawn ScientificPotassium Acetate TS - 1L (1 per EA )Learn Morewas $214.62 Special Price $209.25
- Saline TS, Pyrogen-Free - 1LSKU: TS14236-1L-EAManufacturer: Dawn ScientificSaline TS, Pyrogen-Free - 1L (1 per EA )Learn Morewas $529.62 Special Price $516.38
- Phloroglucinal TS - 1LSKU: TS14204-1L-EAManufacturer: Dawn ScientificPhloroglucinal TS - 1L (1 per EA )Learn Morewas $119.62 Special Price $116.63
- Potassium Hydroxide TS 2, Alcoholic - 1LSKU: TS14221-1L-EAManufacturer: Dawn ScientificPotassium Hydroxide TS 2, Alcoholic - 1L (1 per EA )Learn Morewas $189.62 Special Price $184.87
- Resorcinal TS - 1LSKU: TS14233-1L-EAManufacturer: Dawn ScientificResorcinal TS - 1L (1 per EA )Learn Morewas $199.62 Special Price $194.63
- Thymolphthalein TS - 1LSKU: TS14295-1L-EAManufacturer: Dawn ScientificThymolphthalein TS - 1L (1 per EA )Learn Morewas $194.62 Special Price $189.76
- Trinitrophenol TS - 1LSKU: TS14300-1L-EAManufacturer: Dawn ScientificTrinitrophenol TS - 1L (1 per EA )Learn Morewas $154.62 Special Price $150.76
- Methyl Red TS, Methanolic - 100mLSKU: TS14171-100ml-EAManufacturer: Dawn ScientificMethyl Red TS, Methanolic - 100mL (1 per EA )Learn Morewas $44.62 Special Price $43.50
- Methyl Orange TS - 100mLSKU: TS14167-100ml-EAManufacturer: Dawn ScientificMethyl Orange TS - 100mL (1 per EA )Learn Morewas $34.62 Special Price $33.75
- Methoxyphenylacetic TS - 500mLSKU: TS14166-500ml-EAManufacturer: Dawn ScientificMethoxyphenylacetic TS - 500mL (1 per EA )Learn Morewas $154.62 Special Price $150.76
- Alkaline Cupric Citrate TS - 1LSKU: TS14016-1L-EAManufacturer: Dawn ScientificAlkaline Cupric Citrate TS - 1L (1 per EA )Learn Morewas $389.62 Special Price $379.88
- Ceric Ammonium Nitrate TS - 1LSKU: TS14070-1L-EAManufacturer: Dawn ScientificCeric Ammonium Nitrate TS - 1L (1 per EA )Learn Morewas $259.62 Special Price $253.13
- Cupric Acetate TS, Sronger - 1LSKU: TS14082-1L-EAManufacturer: Dawn ScientificCupric Acetate TS, Sronger - 1L (1 per EA )Learn Morewas $274.62 Special Price $267.75
- Cupric Citrate TS, Alkaline - 1LSKU: TS14085-1L-EAManufacturer: Dawn ScientificCupric Citrate TS, Alkaline - 1L (1 per EA )Learn Morewas $344.62 Special Price $336.01
- Erichrome Black TS - 1LSKU: TS14107-1L-EAManufacturer: Dawn ScientificErichrome Black TS - 1L (1 per EA )Learn Morewas $214.62 Special Price $209.25
- Sulfomolybic Acid TS - 1LSKU: TS14284-1L-EAManufacturer: Dawn ScientificSulfomolybic Acid TS - 1L (1 per EA )Learn Morewas $244.62 Special Price $238.51
- Lead Acetate TS - 1LSKU: TS14143-1L-EAManufacturer: Dawn ScientificLead Acetate TS - 1L (1 per EA )Learn Morewas $194.62 Special Price $189.76
- Phenol Red TS, ( Alcoholic) - 1LSKU: TS14198-1L-EAManufacturer: Dawn ScientificPhenol Red TS, ( Alcoholic) - 1L (1 per EA )Learn Morewas $194.62 Special Price $189.76
- Potassium Iodide TS - 1LSKU: TS14222-1L-EAManufacturer: Dawn ScientificPotassium Iodide TS - 1L (1 per EA )Learn Morewas $169.62 Special Price $165.38
- Potassium Thiocyanate TS - 1LSKU: TS14228-1L-EAManufacturer: Dawn ScientificPotassium Thiocyanate TS - 1L (1 per EA )Learn Morewas $169.62 Special Price $165.38
- Manufacturer Dawn Scientific Remove This Item
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