The HZZD-100 automatic potentiometric titrator is composed of three parts: the main engine, the Metrohm titration device and the computer. Different electrodes can be used to perform: acid-base titration, precipitation titration, redox titration, complexometric titration and other titrations, and has dynamic Titration mode. With the support of the application software, the host can realize automatic titration, automatic liquid replenishment, and calculate the content of the detection data. The key components of the instrument are imported devices, the whole machine has a simple structure, beautiful appearance, high degree of automation, accurate analysis results, etc. It is an ideal intelligent instrument necessary for petrochemical laboratories, analysis rooms and scientific research departments.
The potentiometric titration method is to track and record the electrode potential and titration volume during the titration process, find out the potential characteristic hop (ie equivalent point) and the volume of the standard titration solution corresponding to the potential characteristic hop, so as to obtain the dripped sample. The content of ions in the liquid. HZZD-100 automatic potentiometric titrator is based on this method, in strict accordance with GB/T7304, GB/T264, the titration curve is smoothed, and the titration end point position is corrected, which effectively ensures the accuracy of the results.
II. Basic principles
By collecting the electrode potential, the computer finds out the volume of the standard titration solution at the end point, so as to obtain the ion content in the sample liquid to be dropped. Based on this method,HZZD-100 smoothes the titration curve and corrects the position of the titration end point, which effectively ensures the accuracy of the results. The substance content X [mg/g] in the sample is calculated according to formula (1) or formula (2):
X= …………………… (1)
X= …………………… (2)
III. Technical indicators
1. Applicable standard: GB/T9725
2. Functions: acid-base titration, precipitation titration, redox titration, complexometric titration, non-aqueous titration and other titrations, and has a dynamic titration mode.
3. Potential measurement range; (0～±2000)mV, PH: 0～20.00PH
4. Basic error of electronic unit: mV: ±0.03%F•S± 1 character pH: ±0.001pH ± 1 character
5. Input impedance: Ri≥1×1012Ω
6. The volume of the burette: 10ml, the minimum volume is 0.01mL, the minimum sending volume is 0.001mL, and the resolution of the burette is 1/20000.
7. Burette accuracy: ±0.1% (F•S)
8. Burette dripping time: (60±20) seconds (F•S)
9. Titration unit: Metrohm
10. Minimum sending volume (minimum feeding): 0.001mL
11. Sampling volume: 30ml
12. Repeatability error of titration end point: ≤0.2%
13. Analysis time: depends on the sample size
14. Data communication interface: RS232 or workstation
15. Power: 50w
16. Weight, kg: 6KG
17. Dimensions, mm (L×W×H): 260mm×230mm×460mm
IV. Performance Characteristics
The Metrohm titration unit adopts imported anti-diffusion titration heads. The key components of the titration device are imported, with stable and reliable performance and extremely low transmission noise.
Stable electrode potential: double high resistance input, the electrode potential is more stable and reliable.
Multi-parameter setting and correction makes the analysis of different types of samples simple and fast, with shorter analysis time and more accurate results.
Automatically determine the end point, automatically filter out false end points without indicator, automatically store and print titration results and data, and provide complete titration data for analysis and research.
Automatic cleaning, automatic liquid replenishment, fixed value liquid addition, mechanical and electrical organic combination.
It has the function of automatic calculation of concentration and content. The working curve is automatically fitted with the first and second times. The least squares method (LSM) is used for the fitting, and the confidence interval of the working curve is given. It has the function of automatic sensitivity correction; standard addition method. The test can be repeated 1 to 20 times.
Automatic calculation of mean, standard deviation (SD), relative standard deviation (RSD)
Windows operating system, the operation adopts man-machine dialogue mode, which is simple and easy to understand.
Printable test data and final analysis report
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