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
-
Bromophenol Blue TS - 500mLSKU: TS14064-500ml-EAManufacturer: Dawn ScientificBromophenol Blue TS - 500mL (1 per EA )Learn Morewas $129.62 Special Price $126.38 - Alkaline Sodium Hydrosulphite TS - 1LSKU: TS14022-1L-EAManufacturer: Dawn ScientificAlkaline Sodium Hydrosulphite TS - 1L (1 per EA )Learn Morewas $239.62 Special Price $233.63
- Aminonaphthol sulfonic Acid TS - 1LSKU: TS14024-1L-EAManufacturer: Dawn ScientificAminonaphthol sulfonic Acid TS - 1L (1 per EA )Learn Morewas $269.62 Special Price $262.88
- Ammonium Molybdate TS - 1LSKU: TS14038-1L-EAManufacturer: Dawn ScientificAmmonium Molybdate TS - 1L (1 per EA )Learn Morewas $284.62 Special Price $277.51
- Magnsia Mixture TS - 1LSKU: TS14150-1L-EAManufacturer: Dawn ScientificMagnsia Mixture TS - 1L (1 per EA )Learn Morewas $239.62 Special Price $233.63
- Mercuric Sulfate TS (Denig`es' Reagent) - 1LSKU: TS14162-1L-EAManufacturer: Dawn ScientificMercuric Sulfate TS (Denig`es' Reagent) - 1L (1 per EA )Learn Morewas $319.62 Special Price $311.63
- Potassium Iodoplatinate TS - 50mLSKU: TS14224-50ml-EAManufacturer: Dawn ScientificPotassium Iodoplatinate TS - 50mL (1 per EA )Learn Morewas $339.62 Special Price $331.13
- Bromocresol Green TS - 1LSKU: TS14061-1L-EAManufacturer: Dawn ScientificBromocresol Green TS - 1L (1 per EA )Learn Morewas $79.62 Special Price $77.63
- Sodium Bitartrate TS - 100mLSKU: TS14248-100ml-EAManufacturer: Dawn ScientificSodium Bitartrate TS - 100mL (1 per EA )Learn Morewas $79.62 Special Price $77.63
- 5 mg/ml of thymol in a mixture of alcohol and sulfuric acid - 100mLSKU: TS14304-100ml-EAManufacturer: Dawn Scientific5 mg/ml of thymol in a mixture of alcohol and sulfuric acid - 100mL (1 per EA )Learn Morewas $99.62 Special Price $97.12
- Phenol Red TS, ( Alcoholic) - 500mLSKU: TS14198-500ml-EAManufacturer: Dawn ScientificPhenol Red TS, ( Alcoholic) - 500mL (1 per EA )Learn Morewas $69.62 Special Price $67.88
- Ammonium Carbonate TS 2 - 500mLSKU: TS14035-500ml-EAManufacturer: Dawn ScientificAmmonium Carbonate TS 2 - 500mL (1 per EA )Learn Morewas $119.62 Special Price $116.63
- Potassium Carbonate TS - 100mLSKU: TS14214-100ml-EAManufacturer: Dawn ScientificPotassium Carbonate TS - 100mL (1 per EA )Learn Morewas $44.62 Special Price $43.50
- Sodium Sulfide TS - 500mLSKU: TS14265-500ml-EAManufacturer: Dawn ScientificSodium Sulfide TS - 500mL (1 per EA )Learn Morewas $164.62 Special Price $160.51
- Glycrerin Base TS - 500mLSKU: TS14122-500ml-EAManufacturer: Dawn ScientificGlycrerin Base TS - 500mL (1 per EA )Learn Morewas $64.62 Special Price $63.01
- Alkaline Cupric Citrate TS 2 - 100mLSKU: TS14017-100ml-EAManufacturer: Dawn ScientificAlkaline Cupric Citrate TS 2 - 100mL (1 per EA )Learn Morewas $94.62 Special Price $92.25
- Mercurous Nitrate TS - 500mLSKU: TS14163-500ml-EAManufacturer: Dawn ScientificMercurous Nitrate TS - 500mL (1 per EA )Learn Morewas $219.62 Special Price $214.13
- Cupric Citrate TS, Alkaline - 100mLSKU: TS14085-100ml-EAManufacturer: Dawn ScientificCupric Citrate TS, Alkaline - 100mL (1 per EA )Learn Morewas $59.62 Special Price $58.13
- Sodium Acetate TS - 500mLSKU: TS14244-500ml-EAManufacturer: Dawn ScientificSodium Acetate TS - 500mL (1 per EA )Learn Morewas $59.62 Special Price $58.13
- Sodium Hypochlorite 5% ACS - ACS, 1L (Pack of 4)Manufacturer: Dawn ScientificSodium Hypochlorite 5% ACS - ACS, 1L (Pack of 4) (4 per PK )Learn Morewas $144.62 Special Price $141.00
- Cobaltous Chloride TS - 1LSKU: TS14075-1L-EAManufacturer: Dawn ScientificCobaltous Chloride TS - 1L (1 per EA )Learn Morewas $319.62 Special Price $311.63
- Mercurous Nitrate TS - 1LSKU: TS14163-1L-EAManufacturer: Dawn ScientificMercurous Nitrate TS - 1L (1 per EA )Learn Morewas $374.62 Special Price $365.26
- Ammonia-Ammonium Chloride Buffer TS - 1LSKU: TS14029-1L-EAManufacturer: Dawn ScientificAmmonia-Ammonium Chloride Buffer TS - 1L (1 per EA )Learn Morewas $149.62 Special Price $145.88
- Calcium Chloride TS - 1LSKU: TS14067-1L-EAManufacturer: Dawn ScientificCalcium Chloride TS - 1L (1 per EA )Learn Morewas $109.62 Special Price $106.88
- 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