Buffer Capsules will accurately produce 100 ml. of solution at pH 4.00, 7.00 and 10.00. Hydrion Buffers are free flowing soluble powders that prepare clear or color safe solutions in minutes. The set contains 1 vial of each buffer standard, with each vial containing 10 capsules.
Phosphate Buffer pH 7.5: Dissolve 6.8 g of potassium dihydrogen orthophosphate and 1.56 g of sodium hydroxide in 900 ml of water adjust the pH 7.5 with sodium hydroxide solution and dilute with water to produce 1000 ml.
phosphate buffers if you are studying metal ion interactions. Nitrogen based buffers seem better for other applications.
Phosphate Buffer Solution, pH 7, Honeywell™ Fluka™. Brand Honeywell Fluka 73173-1L Additional Details Weight 1.01000kg.
Buffer solution, pH 7.00 (±0.01 @ 25°C), Colored Green, Specpure®, NIST Traceable Buffer solution pH = 7,00 (20 °C) (Potassium dihydrogen phosphate/di-Sodium hydrogen phosphate).