HI84500-55 Pump Calibration Standard for HI84500 (120 mL)

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HI84500-55 Pump Calibration Standard for HI84500 (120 mL)

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The HI84500 free and total sulfur dioxide mini titrator incorporates a precise piston dosing system for the precise delivery of a titrant. The HI84500-55 is a pump calibration standard that is used to calibrate the dosing system. A calibrated dosing pump allows for the accurate determination of the amount of titrant used when performing a titration. The amount of volume dosed along with the concentration of the titrant is used by the pre-programmed formula within the HI84500 in determining the exact concentration of sulfur dioxide. The pump calibration procedure should be performed anytime the titrant or ORP electrode is replaced.

Pre-standardized titrant

Clearly marked expiration date and lot number

air tight bottle

Air tight bottle with tamper-proof seal to ensure quality


The HI84500 determines the free and total sulfur dioxide concentration in wine using the Ripper method. Excess iodide is added to the wine sample and reacts with the iodate titrant to produce iodine:

IO3- + 5I- + 6H+ → 3I2 + 3H2O

The iodine produced reacts with sulfur dioxide in the wine according to the redox reaction below:

H2SO3 + I2 → H2SO4 + 2HI

The HI84500 mini titrator is designed to determine free and total sulfur dioxide levels in wine by potentiometric titration in both a low range (1.0 to 40.0 ppm of SO2) and high range (30 to 400 ppm of SO2). The HI84500 can be used with all wines, including red, which are difficult to test using traditional methods due to the difficulty to observe a distinctive color change when the endpoint is reached.

Analysis of sulfur dioxide in wine, as performed on the HI84500 mini titrator, utilizes a simple sample preparation, a high quality titrant dosing pump, potentiometric endpoint detector, and automatic computations. To maintain the high precision of the titrator, a simple pump calibration procedure is performed. The pump calibration procedure involves the analysis of a known volume of a known solution. 1 ml of the pump calibration solution is used for the low while 10 ml is used for the high range. The pump calibration procedure should be performed anytime the titrant, syringe, tubing or ORP electrode is replaced. Periodic calibrations should be performed in order to accurately determine the free and total sulfur dioxide levels in wine.

The HI84500-55 is a 120 mL bottle of pump calibration standard solution. The number of calibrations performed will be determined by the range being calibrated. The low range uses 1 ml of the standard and the high range uses 10 ml.

Replacement reagents required to operate the HI84500


Low Range - 1.0 to 40.0 ppm of SO2

High Range - 30 to 400 ppm of SO2

Pump calibration standard



Titrant solution



Acid reagent



Alkaline reagent (Total SO2)



Stabilizer powder packets





Package bottles
Size 120 mL
Quantity 1