pH 4.01

• Excellent Choice Hanna's Buffer solutions are made from established formulas and are standardized with a pH meter that is calibrated to NBS/NIST primary standard buffer solutions. The 20 mL sachets are ideal for infrequent calibrations while for heavy-duty applications, you can choose from the popular 230 mL, 1 liter or 1 gallon containers. Now the pH 4 buffers carry lot #, expiry date as well as pH/°C chart on every bottle. HI 7004L/C and HI 8004L/C are also supplied with an analysis certificate.
• NIST Traceability The ingredients of Hanna pH 4 buffers are Potassium Hydrogen Phthalate. They are standardized using a pH meter calibrated by primary standard buffer solutions (NIST 186 Ie, NIST 186 IIe and NIST 185g S.R.M.). The pH value is certified traceable to NIST 185g S.R.M.

pH 6.86

• NBS (NIST) Buffers The use of pH 6 to calibrate offset of pH meters at 6.86 was commonplace not that long ago. This buffer provided better accuracy but was known to be less stable. The introduction of microprocessors into pH meters eliminated calibration trimmers and screwdrivers by automatically recognizing buffers. Yet, this meant that in most cases the microprocessor was not able to distinguish between pH 6.86 and 7.01. As a result the former was dropped in favor of pH 7.01. Hanna has brought this important buffer back into modern pH meters by offering microprocessor portable and bench meters such as HI 9625, HI 9321 & pH 300, which can be calibrated at 6.86 as well as pH 7.01. The range of Hanna pH 6 buffers has been extended and the stability greatly enhanced to match that of pH 7.
• NIST Traceability pH 6 buffer is standardized with a pH meter that is calibrated to NIST buffer solutions. The ingredients are Potassium Dihydrogen Phosphate and Disodium Hydrogen Phosphate and the buffer is traceable to NIST 186Ie and 186IIe S.R.M.

pH 7.01

• Wide Range pH 7 is the most frequently used pH buffer. As a result we've provided a wide range of solutions to suit every application. Whether you prefer to have your buffer in small disposable 30 mL bottles or need a much larger volume, you need to look no further. You can save money by ordering 16 x 230 mL or 12 x 460 mL bottles which come in a case specially made to keep buffers protected from direct light. All Hanna solution bottles come with a pH Vs. Temperature chart together with the production lot # and expiration date to guarantee maximum accuracy. HI 7007L/C and HI 8007L/C are supplied with an analysis certificate.
• Formulation Hanna pH buffers are made of Potassium Dihydrogen Phosphate and Disodium Hydrogen Phosphate and are standardized with a pH meter that is calibrated to NIST primary standard buffer solutions (NIST 186Ie & 186IIe and NIST 158g S.R.M.).
• FDA Approved Material To ensure utmost reliability use Hanna FDA approved amber bottles which stop light from interfering with the solutions' balanced value.

pH 9.18

• NBS (NIST) Buffers When measuring alkaline samples, you now have the choice of a wide range of pH 9 buffers as well as pH 10 solutions. This provides you with greater versatility, especially with the microprocessor based Hanna portable HI 9625 and bench pH 301, pH meters which can both be calibrated at pH 9 and 10. The pH 9 buffers carry lot #, expiration dates as well as a pH/°C chart on every bottle. You also have the option of purchasing the new economical cases of 12 and 16. The HI 7009L/C and 8009L/C are supplied with an analysis certificate.
• NIST Traceable Hanna buffers are prepared using analytical grade chemicals in closely monitored laboratories with a pH meter that is calibrated to NBS/NIST primary standard buffer solutions (NIST 186Ie, 186IIe 191a and 192a). The buffer values are certified traceable to NIST 187c S.R.M.

pH 10.01

• Ready-Made Choose from a wide range of pH buffers in different sizes, transparent or color-coded for easy recognition. You can also obtain these new alkaline solutions in specially designed cases of 16 x 230 mL or 12 x 460 mL bottles for better safety and storage. The HI 7010L/C and HI 8010L/C are now supplied with a certificate of analysis.
• NIST Traceability Hanna pH 10 ingredients are carefully weighted with the highest quality Sodium Bicarbonate and Sodium Carbonate. They are standardized with a pH meter that is calibrated to NBS/NIST primary standard buffer solutions and the pH value is traceable to NIST 191a and NIST 192a S.R.M.
• FDA Approved Material FDA-approved opaque bottles of HI 8010 series of Hanna buffers stop light from interfering with the solutions' carefully balanced value

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