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Free quotations · Genuine products · Delivery across Thailand and worldwide
Product code: MX-12532
The HI84529U-01 uses methods based on AOAC International and Standard Methods for the Examination of Dairy Products. Both of these methods report titratable acidity as % lactic acid and a conversion factor is used to convert the results to the other available units.
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The HI84529U-01 uses methods based on AOAC International and Standard Methods for the Examination of Dairy Products. Both of these methods report titratable acidity as % lactic acid and a conversion factor is used to convert the results to the other available units. The HI84529U-01 can be customized to meet the needs of any dairy analysis lab. Samples can be titrated by weight or volume, diluted or non-diluted (low range only) and titrated to a fixed pH endpoint that can be adjusted by the user. The HI84529U-01 offers three different methods depending on the expected range and the weight of sample used. Select low range 50 to titrate a 50 mL or 50 g undiluted sample. The other titration options are low range 20 and high range 20 to titrate 20 mL or 20 g samples that are diluted twice their volume with deionized or distilled water. There are two fundamentally different measurements of dairy products: titratable acidity and pH. pH is a measurement of hydrogen ion concentration while titratable acidity is the neutralizing capacity of a dairy product with NaOH. An increase in acidity can be caused by bacteria formation. Monitoring acidity is a way of determining the quality and freshness of dairy products. Acidity is determined by a pH endpoint titration using NaOH (sodium hydroxide) and is defined as the consumption necessary to shift the pH value from 6.6 (corresponding to fresh milk) to a pre-determined pH value. When using phenolphthalein as an indicator, a faint pink color change occurs at pH 8.3. Titratable acidity is expressed in a variety of units based on the titration method performed. Each method varies in sample size and strength of NaOH used for the titration. % Lactic Acid (%l.a.): Determined by taking a 20 mL or 20 g sample and diluting with twice its volume with deionized or distilled water. The sample is then titrated with 0.1 M NaOH to a phenolphthalein endpoint. Degree Soxhlet Henkel (°SH): Determined by titrating a 50 mL sample with 0.1 M NaOH to a phenolphthalein endpoint. Degree Dornic (°D): Determined by titrating a 100 mL sample with N/9 NaOH to a phenolphthalein endpoint. Degree Thrner: Determined by taking a 10 mL sample and diluting with twice its volume with deionized or distilled water. The sample is then titrated with 0.1 M NaOH to a phenolphthalein endpoint. Knowing the relationship between sample weight or volume and strength of titrant it is possible to convert the reading obtained from one method to another. Below is a table with the factors preprogrammed in the HI84529U-01 for converting between various units of measure. From: To: Divide By: %l.a.
| Range | Low Range: %l.a.: 0.01 to 0.20 °SH: 0.4 to 8.9 °D: 1.0 to 20.0 °Th: 1.1 to 22.2 High Range: %l.a.: 0.1 to 2.0 °SH: 4.4 to 88.9 °D: 10 to 200 °Th: 11.1 to 222.2 |
|---|---|
| Resolution | Low Range: %I.a.: 0.01 °SH: 0.1 °D: 0.1 °Th: 0.1 High Range: %I.a.: 0.1 °SH: 0.1 °D: 1 °Th: 0.1 |
| Accuracy (@25ºC/77ºF) | Low Range: ± 0.01 %l.a. High Range: ± 0.1 %l.a. |
| Sample Volume | LR 20: 20 mL or 20 g LR 50: 50 mL or 50 g HR 20: 20 mL or 20 g |
| Methods | acid base titration |
| Principle | endpoint titration |
| Pump Speed | 10 mL/min |
| Stirring Speed | 800 rpm |
| pH Range | -2.0 to 16.0 pH -2.00 to 16.00 pH |
| pH Resolution | 0.1 pH / 0.01 pH |
| pH Accuracy (@25ºC/77ºF) | ±0.01 pH |
| pH Calibration | one, two, or three-point calibration, four available buffers (4.01, 7.01, 8.20, 10.01) |
| Temperature Compensation | manual or automatic |
| mV Range | -2000.0 to 2000.0 mV |
| mV Resolution | 0.1 mV |
| mV Accuracy (@25ºC/77ºF) | ±1.0 mV |
| Temperature Range | -20.0 to 120.0°C -4.0 to 248.0°F 253.2 to 393.2 K |
| Temperature Resolution | 0.1°C 0.1°F 0.1K |
| Temperature Accuracy (@25ºC/77ºF) | ±0.4°C ±0.8°F ±0.4 K |
| Logging Data | up to 400 ( 200 titrations, 200 pH/mV readings) |
| Electrode | FC260B pH electrode with 1 m (3.3') cable (included), HI5315 reference probe with 1 m (3.3') cable (included) |
| Temperature Probe | HI7662-M stainless steel temperature probe with 1 m (3.3') cable (included) |
| Environment | 0 to 50°C (32 to 122°F) RH max 95% non-condensing |
| Power Supply | 12 VDC adapter (included) |
| Dimensions | 235 x 200 x 150 mm (9.2 x 7.9 x 5.9in.) |
| Weight | 1.9 kg (67.0 oz.) |
| Warranty | 2 years |
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