UV fluorescence sulfur analyzer

1

detection method

The ultraviolet fluorescence method uses a pulsed scintillation xenon lamp as the excitation light source for the ultraviolet lamp.

2

Applicable method

SH/T 0689TheGB/T 34100TheGB/T 11141TheGB/T 11060.8TheYB/T5022TheASTM D5453TheASTM D6667TheSH/T 1820、SH/T 0917wait

3

analyze samples

forDetermination of total sulfur content in petrochemical products such as crude oil, distillate oil, petroleum gas, coal, naphtha raw materials, and pre hydrogenation raw materialsanalyze

4

Measurable sample status

liquid, gas

5

injection volume

Liquid:2～50ul

Gas:5ml

6

measurement range

0.01mg/L～10000mg/L~percentage content

7

minimum detectable concentration

0.01mg/L

8

Temperature control range and accuracy:

0℃～1300℃，±1℃

9

measurement accuracy

(Continuous sampling6time)

0.2mg/LStandard sample:RSD≤10%

1mg/LStandard sample:RSD≤8%；

5mg/LStandard sample:RSD≤5%；

10mg/LStandard sample:RSD≤3%.

10

Negative high voltage

DC400V～1200VThe desired value can be set according to the high or low concentration measured

11

baseline drift

not greater than5mv/min

12

Air source requirements

Oxygen purity99.75%，Output pressure ≤0.2MPa；

Purity of argon gas99.998%，Output pressure ≤0.2MPa；

13

analysis time

2～4min

14

Data communication interface

RS232, canLimitsData transmission between systems

1

key component

UV lamp, power supply, photomultiplier tube, monochromator, membrane dryermicrosyringeAll key components are imported devices to ensure the accuracy of instrument detection and service life.

2

Blind sleeve typequartz tube

Blind quartz tube ensures the combustion efficiency of the sample through back and forth combustion, without the need for tungsten trioxide as a catalyst, which can also increase the conversion rate of the sample and avoid carbon deposition.

3

Gas flow control

Using a mass flow meter and computer-controlled gas flow rate, the gas flow rate is stable, accurate, and without fluctuations. The instrument has better repeatability and higher measurement accuracy for small content samples. At the same time, the mass flow meter detects abnormal flow of carrier gas or auxiliary gas, and the workstation suspends the injection of oil samples to prevent carbon deposition and contamination of the gas path and detector due to sample oxygen deficiency cracking.

4

Gas stabilization system

The installation of a pressure stabilization system in the gas circuit avoids interference from gas flow and pressure fluctuations on the measurement.

5

Temperature control system

Automatic control device for cracking furnace fan, automatic on/off of cooling fan, no need for personnel to wait for shutdown.

It has the function of warning errors during operation and prohibiting sample injection due to errors, and has the function of automatic power-off protection against overheating.

6

Testing Room

Adopting the latest foreign processes and technologies to ensure the airtightness of each component, no air leakage, no light leakage, and minimal external interference.

Adopting imported coating materials and advanced spraying technology to ensure lower background noise in the detection room, improve instrument sensitivity and detection limit.

7

drying system

Imported membrane dryer is used for dehydration, which does not require frequent replacement and has stable performance.

8

cracking furnace

Using imported electric furnace wire to improve the service life of the cracking furnace.

injection system

1

Fully automatic sampling system

adopt19bitor156bitFully automatic sampling system for injection,Computer control,Direct injection,The experimental process is fully automated, with automatic sample replacement, automatic cleaning, automatic elimination of errors caused by bubbles using the volume difference method, and automatic drawing of standard curves. The injection speed is constant and can be adjusted according to the sample.

Sample injector on computerEnd to endSettings, no need for users to individually set up the injector. User initiated detection allows for unmanned operation, reducing the workload for operatorsandThe system detection error caused by human injection error has improved work efficiencyAnd detection accuracy.

During the testing process, parameters such as the number of tests, injection volume, and analysis time of the test sample can be modified at any time, with functions such as sample addition, replacement, and priority testing.

2

Vertical injection

Fully automatic injection adopts vertical combustion analysis mode; Ensure the conversion efficiency of sulfur, which is generated after combustionSO₂Directly enter the UV fluorescence sulfur detector for detection.

3

Air path blowing

Rinse the pipeline with carrier gas and sample gas to eliminate interference from switching detection between different samples.

4

syringe needle

Adopting a replaceable needle type injection needle, with a needle length ≥7cmEnsure that the sample is fully burned at the optimal combustion position to avoid carbon deposition.

5

silicone pad

Imported silicone pads are used, and the number of sample injections per silicone pad is ≥300Needle, reduce the frequency of silicone pad replacement, and improve the detection efficiency of the instrument.

Workstation system

1

standard curve

Segmentable standard curve, integrating segmented standard curves into one standard curve (e.g0.2-0.5-1.0-5-10-50-100-…mg/L）The instrument automatically retrieves the appropriate standard curve for sample preparation based on the sample content size, without the need for manual operation by personnel.

The workstation has the function of identifying the working status and parameters of standard curves, and promptly correcting deviations caused by the attenuation of ultraviolet excitation light sources and the decrease in detector performance.

2

Curve correction

Combining single point correction and multi-point correction to automatically generate correction curves.

The workstation provides users with a multi-point high-order curve fitting method, reducing the deviation caused by the linear correlation of the fitting curve in the detection results of low content samples, making the results closer to the true value.

3

Automatic correction

During the sample testing process, the workstation can automatically correct the system curve deviation based on the standard sample testing results.

4

monitoring system

Workstation monitors instrument status in real-time, including gas flow rate, furnace temperature, baseline, and other conditions,When an abnormality occurs, the instrument automatically cools down and enters a protective state to ensure laboratory safety.

5

Sleep wake-up function

The sleep function can set the combustion furnace temperature, gas flow rate, etc. After completing the analysis, the instrument automatically enters the sleep state and runs in a low-power state.

The wake-up function can wake up at any set time, allowing the instrument to complete self inspection and enter working mode without the operator being present on site.

6

data processing

The analysis process and data processing process are controlled by computers, which are easy to operate,Equipped with a data processing system，Having concentration, content, unit conversionRSDWaiting for automatic calculation function.

Equipped with self checking function, if there is any abnormal data in a certain area, the workstation will issue an alarm and display text prompts on the screen

7

The data shows

Screen display parameters, measurement peak shape, andexperimentresult.

Can be queried, stored, and printedspectrogramandThe experimental results,can useEXCELedit.

Data output providedXMLData format files,Can meetLIMSSystem compatibility requirements.

8

operating platform

WindowsfuckAs a platform,It has human-machine dialogue function, and the analysis process and data processing process are controlled by a computer, making it easy to operate.

9

Result printing

Can print test data and final analysis report,