A buffer is a solution that can resist pH change with the addition of an acid or base. It is able to neutralise small amounts of added acid or base, thus maintaining the pH of the solution relatively stable. This is important for processes and or reactions which require specific and stable pH ranges.

Buffers generally consist of a weak acid and its salt or a weak base and its salt. The solutions resist pH change because of a chemical equilibrium between the weak acid HA and its conjugate base A:

HA ⇌ H+ + A
 

Buffers are used with fixatives which require certain properties: 

1. A constant pH during the time of the fixation (The pH of the fixative in electron microscopy is adjusted using the buffer system chosen)

2. Prevention of the extraction of cellular components, or the deposition of precipitates of fixative chemicals. 

A wide range of buffer solutions and powders are available, suitable for most laboratory applications.

CHEM Buffers

 

Code Title Option 1 Option 2 Option 3 Availability* Price
EMS26671-02 Acetate buffer (DG) 6.5-8.0 500ml 2 weeks AU $80.00
EMS11480 Acetate buffer 0.2M (DG) 3.5 - 5.6 225ml leadtime:4-6 weeks AU $84.00
EMS11482 Acetate buffer 0.2M (DG) 3.5 - 5.6 500ml leadtime:4-6 weeks AU $126.00
EMS11482-42 Acetate buffer 0.2M (DG) 4.2 500ml leadtime:4-6 weeks AU $126.00
EMS11482-50 Acetate buffer 0.2M (DG) 5 500ml leadtime:4-6 weeks AU $126.00
EMS11482-56 Acetate buffer 0.2M (DG) 5.6 500ml leadtime:4-6 weeks AU $126.00
EMS11455-78 Borate buffer pH 7.8 500ml 2 weeks AU $97.00
EMS11455-82 Borate buffer pH 8.2 500ml 2 weeks AU $103.00
EMS11455-90 Borate buffer pH 9.0 500ml 2 weeks AU $103.00
EMS26303-03 Borate buffer 0.1M 9 500ml 2 weeks AU $80.00
EMS64142-07 Citrate buffer 6 100ml 2 weeks AU $176.00
EMS64142-08 Citrate buffer 6 1L 2 weeks AU $295.00
EMS11490 Citrate buffer 0.1M 4.6-6.2 225ml 2 weeks AU $57.00
EMS11492 Citrate buffer 0.1M 4.6-6.2 500ml 2 weeks AU $75.00
EMS11492-04 Citrate Buffer 0.2M pH 4.0 1L 2 weeks AU $130.00
EMS11492-06 Citrate Buffer 0.2M pH 6.0 1L 2 weeks AU $134.00
EMS11772-05 D-Phosphate buffer saline formula Formula I, 0.15M 500ml 2 weeks AU $83.00
EMS11772-10 D-Phosphate buffer saline formula Formula I, 0.15M 1L 2 weeks AU $108.00
EMS11773-05 D-Phosphate buffer saline formula Formula II, 0.19M 500ml 2 weeks AU $83.00
EMS11773-10 D-Phosphate buffer saline formula Formula II, 0.19M 1L 2 weeks AU $111.00
EMS11774-05 D-Phosphate buffer saline formula Formula III, 0.15M 500ml 2 weeks AU $92.00
EMS11774-10 D-Phosphate buffer saline formula Formula III, 0.15M 1L 2 weeks AU $118.00
EMS64142-09 EDTA buffer (10X) 8.5 100ml 2 weeks AU $176.00
EMS64142-10 EDTA buffer (10X) 8.5 1L 2 weeks AU $295.00
EMS16530 Glutaraldehyde 10% in solvent (DG) Acetone 10 x 10ml 2 weeks AU $200.00
EMS16531 Glutaraldehyde 10% in solvent (DG) Ethanol 10 x 10ml 2 weeks AU $200.00
EMS16532 Glutaraldehyde 10% in solvent (DG) Methanol 10 x 10ml 2 weeks AU $200.00
AHEP68-1L Hepes buffer solution 6.8 1L 3 weeks AU $163.00
EMS11494 Hepes buffer solution, 0.2M 7.0-8.0 500ml 2 weeks AU $73.00
C018 Hepes buffer, powder 7.0-8.0 25g 2 weeks AU $47.00
C0181 Hepes buffer, powder 7.0-8.0 100g 2 weeks AU $124.00
EMS18041-05 Michel's buffer 7.4 500ml 2 weeks AU $73.00
EMS18041-10 Michel's buffer 7.4 1L 2 weeks AU $108.00
EMS11582-05 Millonig's phosphate buffer, 0.2M 7.4 500ml 2 weeks AU $74.00
EMS11582-10 Millonig's phosphate buffer, 0.2M 7.4 1L 2 weeks AU $111.00
EMS18900 Mops biological buffer 6.5-7.9 100g 2 weeks AU $167.00
EMS11162 PHEM buffer 0.1M 225ml 2 weeks AU $119.00
EMS11163 PHEM buffer 0.1M 500ml 2 weeks AU $200.00
EMS11164 PHEM buffer 0.2M 225ml 2 weeks AU $119.00
EMS11165 PHEM buffer 0.2M 500ml 2 weeks AU $200.00
EMS19340-60 Phosphate buffer 0.1M (EMS) 6 1L 2 weeks AU $125.00
EMS19340-65 Phosphate buffer 0.1M (EMS) 6.5 1L 2 weeks AU $125.00
EMS19340-70 Phosphate buffer 0.1M (EMS) 7 1L 2 weeks AU $125.00
EMS19340-72 Phosphate buffer 0.1M (EMS) 7.2 1L 2 weeks AU $125.00
EMS19342-10 Phosphate buffered saline, 10X (EMS) 7.4 1L 2 weeks AU $108.00
EMS19342-40 Phosphate buffered saline, 10X (EMS) 7.4 3785ml 2 weeks AU $325.00
EMS19344-10 Phosphate buffered saline, 1X (EMS) 7.4 1L 2 weeks AU $95.00
EMS19344-20 Phosphate buffered saline, 1X (EMS) 7.4 3785ml 2 weeks AU $284.00
EMS19343-10 Phosphate buffered saline, 2X (EMS) 7.4 1L 2 weeks AU $101.00
EMS19343-40 Phosphate buffered saline, 2X (EMS) 7.4 3785ml 2 weeks AU $305.00
APBS-1L Phosphate buffered saline, pH 7.4 7.4 1L 3 weeks AU $114.00
EMS11610 Pipes buffer solution 0.3M 5.5-6.0 500ml 2 weeks AU $134.00
C022 Pipes buffer, powder 6.4-7.2 25g 2 weeks AU $108.00
C0221 Pipes buffer, powder 6.4-7.2 100g 2 weeks AU $337.00
EMS62706-12 R-Buffer (DG) for retriever slide stainer 4.5 (C) 250ml 2 weeks AU $178.00
EMS62706-10 R-Buffers for retriever slide stainer 6.0 (A) 250ml 2 weeks AU $178.00
EMS62706-11 R-Buffers for retriever slide stainer 8.0 (B) 250ml 2 weeks AU $178.00
EMS62706-13 R-Buffers for retriever slide stainer 6.0 (U) 250ml 2 weeks AU $178.00
EMS62707-10 R-Buffers for retriever slide stainer 6.0 (Ag) 250ml 2 weeks AU $178.00
EMS62707-11 R-Buffers for retriever slide stainer 8.0 (Bg) 250ml 2 weeks AU $178.00
EMS62707-12 R-Buffers for retriever slide stainer 4.5 (Cg) 250ml 2 weeks AU $178.00
EMS62707-13 R-Buffers for retriever slide stainer 6.0 (Ug) 250ml 2 weeks AU $178.00
EMS15953 Sodium cacodylate buffer 7.4 10 x Vials/10ml 2 weeks AU $106.00
EMS11650 Sodium cacodylate buffer 0.2M 7.4 225ml 2 weeks AU $84.00
EMS11652 Sodium cacodylate buffer 0.2M 7.4 500ml 2 weeks AU $120.00
EMS11653 Sodium cacodylate buffer 0.2M 7.4 1L 2 weeks AU $215.00
EMS11654 Sodium cacodylate buffer 0.4M 7.2 500ml 2 weeks AU $159.00
EMS11655 Sodium cacodylate buffer 0.4M 7.2 1L 2 weeks AU $266.00
C216 Sodium hydrogen phosphate, monobasic 4.1-4.5 500g 2 weeks AU $103.00
EMS11682-05 Sorensen's phosphate buffer 0.15M 7.4 500ml 2 weeks AU $86.00
EMS11682-10 Sorensen's phosphate buffer 0.15M 7.4 1L 2 weeks AU $113.00
EMS11600-05 Sorensen's phosphate buffer 0.2M 7.2 500ml 2 weeks AU $78.00
EMS11600-10 Sorensen's phosphate buffer 0.2M 7.2 1L 2 weeks AU $111.00
EMS11600-40 Sorensen's phosphate buffer 0.2M 7.2 4L 2 weeks AU $351.00
EMS11601-10 Sorensen's phosphate buffer 0.2M 7.4 1L 2 weeks AU $113.00
EMS11601-40 Sorensen's phosphate buffer 0.2M 7.4 4L 2 weeks AU $351.00
ASOR68C-1L Sorensen's phosphate buffer, 2M 6.8 1L 3 weeks AU $68.00
ASOR68C-5L Sorensen's phosphate buffer, 2M 6.8 5L 3 weeks AU $283.00
EMS11730-05 Tris buffer 0.2M 8 250ml 2 weeks AU $69.00
EMS11730-06 Tris buffer 0.2M 8 500ml 2 weeks AU $92.00
EMS11730-08 Tris buffered saline, pH 7.4 7.4 250ml 2 weeks AU $69.00
EMS11730-09 Tris buffered saline, pH 7.4 7.4 500ml 2 weeks AU $92.00
EMS11730 Tris Maleate buffer 0.2M 6.4-8.0 250ml 2 weeks AU $69.00
EMS11740 Tris Maleate buffer 0.2M 6.4-8.0 500ml 2 weeks AU $92.00
EMS11730-20 Tris-HCL buffer 7.2-9.0 250ml 2 weeks AU $69.00
EMS11730-25 Tris-HCL buffer 7.2-9.0 500ml 2 weeks AU $92.00
EMS11730-12 Tris-HCL buffer 1M 6.0-8.0 250ml 2 weeks AU $69.00
EMS11730-15 Tris-HCL buffer 1M 6.0-8.0 500ml 2 weeks AU $92.00
EMS25880-01 Universal Immuno assay buffer 10x 100ml 2 weeks AU $147.00
EMS25880-10 Universal Immuno assay buffer 10x 1L 2 weeks AU $387.00