Nutech VsCMS 6700 VOCs Online Monitoring System

Nutech VsCMS 6700 VOCs Online Monitoring System – For 117 VOCs Target

Nutech VsCMS 6700 consists of Nutech 6600 online Preconcentrator and time-of-flight mass spectrometer (TOF MS) from Hexin Instruments. Through the front-end low-temperature pretreatment like impurities removal, enrichment and concentration, the sample enters into the TOF MS for analysis to realize online continuous monitoring of more than 100 VOCs.

Another solution for 117 VOCs online monitoring – Nutech VsCMS 6600 adopting GC-MS as ana lysis unit

Technical Data

Detection Method: GC-TOF

Detection Limit: 1pg octafluoronaphthalene (OFN)

Signal to Noise Ratio: 100:1

Resolution: 600FWHM or <1amu

Precision: ±0.1amu

Dynamic Detection Range: 4 orders of magnitude

Detection Speed: 100 spectrum/s

Testing Time: full-spectrum detection 1-500amu within a single 30μs

Zero Noise: ≤0.05nmol/mol

Detection Limit: <0.1ppb

Precision: RSD＜5%

Accuracy: ±10%

System Residue: ≤0.1nmol/mol

Parallelism: ≤20%

Sampling Rate: 5~120ml/min

Maximum Heating Rate: 100°C/sec

Temperature Control Accuracy: ±2°C

Compounds Measured: C2~C12 VOCs

System Drift: 24-h concentration drift: ±1nmol/mol; long time concentration drift and retention time drift: FID concentration drift≤15% for 30d continuous operation; retention time drift≤0.5min.

Resolution: Resolution of cyclopentane and isopentane, 2,3-dimethylpentane and 2-methylhexane, and o-xylene and styrene≥1.0.

Clock Error: The instrument is tested for 6 hours under normal working conditions and the clock error is ±20s. The instrument is tested for 6 hours when the IPC is powered off 3 times in total and the clock error is within 2min.

Standard Curve: The correlation coefficient of the standard curve of the target compound is ≥0.98; use the standard curve to calculate the lowest point concentration, and the relative error between the measured average value and the standard value is ≤15%.

Technical Data of TOF MS

Vacuum System

Two-stage differential system to ensure a good vacuum degree (≤5E-3Pa) during sample injection.

Ion Source

Electron impact ion source, independent temperature control ; dual filaments, can be automatically switched; ionization energy 10-150eV.

MS Detector

Detection Limit: 1pg octafluoronaphthalene (OFN)
Signal to Noise Ratio: 100:1
Resolution: 600FWHM or <1amu
Precision: ±0.1amu
Dynamic Detection Range: 4 orders of magnitude
Detection Speed: 100 spectrum/s
Testing Time: full-spectrum detection 1-500amu within a single 30μs

Features

1. Based on cryogenic water removal, low-temperature preconcentration and chromatographic separation technologies, time-of-flight mass spectrometry (TOF MS) is introduced to effectively solved the problem of difficult separation of some target compounds, enhanced qualitative and quantitative capabilities, and improved the accuracy and stability of the instrument.

2. The use of mass spectrometry (MS) detectors increases the analysis and identification of unknown compounds in addition to the identification of standard compounds, and enables the effective qualitative and quantitative analysis of all compounds.

3. It has manual and automatic tuning modes, as well as data acquisition, qualitative and quantitative analysis and library (the latest NIST library) search function.

4. Multi-component real-time display, with the function of simultaneously displaying the IC chart of multiple components, and real-time display of the curve over time.

5. PC control, built-in user security login, equipment security alarm, operation log and other functions. Real-time data collection, transmission, automatic recording, storage and supports QA/QC reports. With historical data (including atlas) query function, the system can automatically save and restore data if the power is cut off unexpectedly.

Chromatogram

Recommended Configuration for Complete Monitoring System

Besides the analysis unit, Nutech can offer the whole VOCs online monitoring system including the sampling unit, the analysis unit, the data collection and transmission unit, quality control unit, gas source unit and other auxiliary products.

Item	Model	Note
Sampling Unit
Sampling Tube (with heat tracing)	NST100	Standard and Customizable
Analysis Unit
VOCs Online Analyzer	6700	Standard, LTP+ GC /TOFMS, PAMS+TO15+OVOCs
Data Collection & Transmission Unit
Computer/IPC	IPC-610	Standard.
Data Collection Unit	N6600 V1.0	Standard.
Quality Control Unit
Precision Dynamic Dilutor	2202B	Standard. Can be purchased locally.
Standard Gas – Internal Standard 4 Species	NSG-IS	Standard. Linde.
Standard Gas – PAMS 57 Species	NSG-PAMS	Standard. Linde.
Standard Gas – TO15 65 Species	NSG-TO15	Standard. Linde.
Standard Gas – OVOCs 13 Species	NSG-OVOCs	Standard. Linde.
Gas Source Unit
High Purity Hydrogen Generator	NHG300	Standard.
Zero Air Generator	NAG1000	Standard.
High Purity Nitrogen	NG-N₂	Standard. Purchased locally.
High Purity Helium	NAG-He	Standard.
Other Auxilliary Equipment
Meteorological Sensor	NTPL100	Optional.
Cabinet	N6837	Optional. Customizable.

This table is the list of standard configuration of VsCMS 6700 VOCs species online monitoring system recommended by Nutech, which can be customized according to customer’s requirements.