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
-
Silver Nitrate, 0.0141 N, 4.00 L Glass amberSKU: CS003800-4C-EAManufacturer: Reagents IncSilver Nitrate, 0.0141 N, 4.00 L Glass amber (1 per EA )Learn Morewas $191.00 Special Price $143.64 -
Phenol Red TS, ( Alcoholic) - 100mLSKU: TS14198-100ml-EAManufacturer: Dawn ScientificPhenol Red TS, ( Alcoholic) - 100mL (1 per EA )Learn Morewas $39.62 Special Price $38.63 -
Pd 250 Reagent Refill, Total Chlorine 1 X 250 Tests, Ea/1SKU: 530151-EAManufacturer: Lovibond Tintometer GroupLovibond PD 250 Reagent Refill, VARIO Total Chlorine, 1 X 250 Tests The fast and easy use of VARIO Powder Packs has made them extremely popular for water testing applications in many countries throughout the world. The Lovibond Powder Pack programmed pro (1 per EA)Learn More$66.80 -
TRIS-BORATE-EDTA, 10X SOLUTION, 4 LITER CAS# 77-86-1; 10043-35-3; 6381-92-6; 7732-18-5SKU: T32020-4000.0-EAManufacturer: Research Products InternationalMol. Wt: Common Name: TRIS-borate-EDTA 10X Solution Formula: Dimensions: 7.00 x 10.50 x 4.50, Weight: 9.69, Cas#: 77-86-1; 10043-35-3; 6381-92-6; 7732-18-5 Research or further manufacturing use only, not for food or drug use. (1 per EA)Learn More$169.70 -
Vario Amino Acid, F10 100 Pack, Ea/1SKU: 531600-EAManufacturer: Lovibond Tintometer GroupDirect Replacement for Hach P/N 2254069. (1 per EA )Learn More$28.29 - Hydrochloric Acid, 0.01 N, 20.00 L CubitainerSKU: C7101010-20F-EAManufacturer: Reagents IncHydrochloric Acid, 0.01 N, 20.00 L Cubitainer (1 per EA )Learn Morewas $187.00 Special Price $140.40
- Amm Chloride/EDTA Soln pH 8.5, 10.00 L CubitainerSKU: CA101700-10F-EAManufacturer: Reagents IncAmm Chloride/EDTA Soln pH 8.5, 10.00 L Cubitainer (1 per EA )Learn Morewas $320.00 Special Price $239.76
- t-Butyl Alcohol, 80% v/v, 10.00 L Clear WinpakSKU: CB180800-10E2-EAManufacturer: Reagents Inct-Butyl Alcohol, 80% v/v, 10.00 L Clear Winpak (1 per EA )Learn Morewas $407.00 Special Price $305.64
- Perchloric Acid, 0.043 N, 1.00 L Glass amberSKU: CP120400-1C-EAManufacturer: Reagents IncPerchloric Acid, 0.043 N, 1.00 L Glass amber (1 per EA )Learn Morewas $110.00 Special Price $82.08
- Sodium Hydroxide, 6 N, 500.00 mL Poly naturalSKU: CS104300-500A-EAManufacturer: Reagents IncSodium Hydroxide, 6 N, 500.00 mL Poly natural (1 per EA )Learn Morewas $46.50 Special Price $34.56
- Potassium Thiocyanate, 10% w/v, 4.00 L Glass amberSKU: CP105700-4C-EAManufacturer: Reagents IncPotassium Thiocyanate, 10% w/v, 4.00 L Glass amber (1 per EA )Learn Morewas $226.00 Special Price $169.56
- Cresol Red TS - 500mLSKU: TS14078-500ml-EAManufacturer: Dawn ScientificCresol Red TS - 500mL (1 per EA )Learn Morewas $39.62 Special Price $38.63
- Glycrerin Base TS - 100mLSKU: TS14122-100ml-EAManufacturer: Dawn ScientificGlycrerin Base TS - 100mL (1 per EA )Learn Morewas $44.62 Special Price $43.50
- Ferrous Sulfate, Acid, TS - 500mLSKU: TS14114-500ml-EAManufacturer: Dawn ScientificFerrous Sulfate, Acid, TS - 500mL (1 per EA )Learn Morewas $124.62 Special Price $121.50
- Alkaline Cupric Tartrate TS - 1LSKU: TS14019-1L-EAManufacturer: Dawn ScientificAlkaline Cupric Tartrate TS - 1L (1 per EA )Learn Morewas $199.62 Special Price $194.63
- Triethanolamine, 90% w/w, 19.00 L EachSKU: CT152500-19y-EAManufacturer: Reagents IncTriethanolamine, 90% w/w, 19.00 L Each (1 per EA )Learn Morewas $1,420.00 Special Price $1,092.42
- Thioacetamide, 0.27 M, 500.00 mL Poly naturalSKU: CT009500-500A-EAManufacturer: Reagents IncThioacetamide, 0.27 M, 500.00 mL Poly natural (1 per EA )Learn Morewas $175.00 Special Price $134.63
- Sodium Nitrite, Saturated, 4.00 L Poly naturalSKU: CS148700-4A-EAManufacturer: Reagents IncSodium Nitrite, Saturated, 4.00 L Poly natural (1 per EA )Learn Morewas $170.00 Special Price $127.44
- Molybdate Reagent, 1.00 L Poly naturalSKU: CM130100-1A-EAManufacturer: Reagents IncMolybdate Reagent, 1.00 L Poly natural (1 per EA )Learn Morewas $576.00 Special Price $432.00
- Potassium Hydroxide, 0.1 N, 4.00 L Poly naturalSKU: CP101600-4A-EAManufacturer: Reagents IncPotassium Hydroxide, 0.1 N, 4.00 L Poly natural (1 per EA )Learn Morewas $92.00 Special Price $69.12
-
Thiosulfate Reagent .75oz DBSKU: R-0774-A-EAManufacturer: Taylor TechnologiesThiosulfate Reagent .75oz DB (1 per EA)Learn Morewas $15.71 Special Price $12.00 - Congo Red TS - 100mLSKU: TS14076-100ml-EAManufacturer: Dawn ScientificCongo Red TS - 100mL (1 per EA )Learn Morewas $39.62 Special Price $38.63
- Titration Solvent for Neut No, 1.00 gal Metal CanSKU: CT125000-4E4-EAManufacturer: Reagents IncTitration Solvent for Neut No, 1.00 gal Metal Can (1 per EA )Learn Morewas $177.00 Special Price $136.17
- Sulfuric Acid, 6 N, 4.00 L Poly naturalSKU: CS106100-4A-EAManufacturer: Reagents IncSulfuric Acid, 6 N, 4.00 L Poly natural (1 per EA )Learn Morewas $129.00 Special Price $97.20
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