Non methane total hydrocarbon determination by gas chromatograph manufacturer

Non methane total hydrocarbon determination by gas chromatograph manufacturerShanghai Xinuo Instrument Co., Ltd. GC9970A new touch wide range gas chromatograph high sensitivity gas chromatograph for trace and trace sample detection needs. In the increasingly complex air environment, it adopts mainstream IP communication technology and is equipped with fully automatic EPC/AFC electronic flow control technology to meet the performance requirements of trace substance detection in the factory. Color graphic touch screen display: This machine adopts a 7-inch touch screen LCD display, with a dynamic display of graphics and a complete temperature control system.

Non methane total hydrocarbons (NMHC) typically refer to all volatile hydrocarbons other than methane, also known as non methane total hydrocarbons. When the concentration of NMHC in the atmosphere exceeds a certain level, it is harmful to human health and can also produce chemical smoke, causing harm to the environment and humans. The factory boundary concentration standard for non methane total hydrocarbons in China's "Comprehensive Emission Standards for Air Pollutants" (GB16927-1996) is 5mg/m3

1、HJ 1012-2018Technical Requirements and Testing Methods for Portable Monitoring Instruments for Total Hydrocarbons, Methane, and Non Methane in Environmental Air and Waste Gas

2. HJ38-2017 "Determination of Total Hydrocarbons, Methane, and Non Methane Total Hydrocarbons in Waste Gas from Fixed Pollution Sources by Gas Chromatography Method"

3Beijing landmarksDB11/T1367-2016Fixed Pollution Source Waste Gas Methane/Total hydrocarbons/The portable hydrogen flame ionization detector method for the determination of non methane total hydrocarbons has been implemented.

4. Method 1 (B) for Determination of Total Hydrocarbons and Non Methane Hydrocarbons (Fourth Edition of Air and Waste Gas Monitoring and Analysis Methods)

5. HJ 604-2017 Determination of Total Hydrocarbons, Methane, and Non Methane in Environmental Air by Direct Injection Gas Chromatography Method

The single FID detection process using a ten way valve with dual column parallel injection effectively eliminates measurement errors caused by differences in FID sensitivity during dual FID analysis, meeting the detection requirements for total hydrocarbons and non methane total hydrocarbons in the air,Detection concentration 0.05mg/m3; And only one injection is needed to analyze both total hydrocarbons and non methane total hydrocarbons simultaneously.

Non methane total hydrocarbon determination by gas chromatograph manufacturer Meets the requirements of analytical methods such as GB/T15263-94 "Determination of Total Hydrocarbons in Environmental Air - Gas Chromatography Method", HJ/T38-1999 "Determination of Non Methane Total Hydrocarbons in Fixed Source Exhaust Gas - Gas Chromatography Method", and "Air and Waste Gas Monitoring Methods (Fourth Edition)".

Transmission communication function:

Adopting 10/100 adaptive Ethernet IEEE802.3 communication interface, with fast transmission speed.

Multi channel network workstation:

Sensitivity hydrogen flame ion detector:

Adopting high-temperature stainless steel nozzle, suitable for capillary and packed column analysis, using low-noise wide range logarithmic amplifier, the system is stable and durable for most organic compound response values.

Gas Pressure/Flow Electronic Control Module (EPC/AFC)

This instrument is equipped with an EPC/AFC gas pressure/flow electronic control module, which replaces traditional manual pressure/flow control systems and provides users with a flexible and intelligent fully automatic pressure/flow control system.

The internal air circuits of the instrument are individually controlled, and each channel can replace manual pressure control valves, pressure stabilizing valves, flow stabilizing valves, back pressure valves, needle valves, air resistance valves, and proportional valves. The product has excellent resolution and control performance. At the same time, the device dynamically compensates for external pressure and temperature to achieve output. In addition, users can switch between high and low flow rates by changing the air resistance of the outlet.

The instrument is equipped with pressure and flow control modules, which can automatically adjust the outlet pressure according to changes, thus overcoming the problem of traditional mass flow meters being unable to control under outlet pressure. Users only need to input the parameters of the chromatographic column, and EPC/AFC can automatically calculate and set the pre column pressure and chromatographic column flow rate. The entire instrument is automatically controlled throughout the process without manual adjustment

Main technical parameters:

1. Technical parameters for gas path control of injection system:

SSL diversion without diversion: constant current mode/constant voltage mode/pulse

PIP filling column system: constant current mode/constant pressure mode

Gas flow range; 0-1000ml/min(He,H2）0-200ml/min(N2,AIR,CH4)

Split ratio: large adjustable 7500:1 Diaphragm blowing: available

Accuracy of pressure sensor: ＜ ± 2%

Repeatability of pressure sensor: ＜ ± 0.15%

2. Technical parameters for gas path control of the detection system:

FID detector EPC: Gas (H2) 0-100ml/min, Auxiliary Gas (Air) 0-800ml/min, Tail Gas (N2/He) 0-100ml/min

TCD detector EPC: carrier gas (H2, He, N2) 0-100ml/min

FPD detector EPC: Gas (H2) 0-250ml/min, Auxiliary Gas (Air) 0-150ml/min, Tail Gas (N2/He) 0-150ml/min

ECD detector EPC: Carrier gas (He, N2) 0-150ml/min

NPD detector EPC: Gas (H2) 0-200ml/min, Auxiliary Gas (Air) 0-50ml/min, Tail Gas (N2/He) 0-100ml/min

AUX auxiliary gas EPC: pressure mode (optional air resistance), supports 3-stage program boosting

Module channel: FID/FPD/NPD/AUX EPC 3-channel

TCD EPC 2-channel

ECD EPC 1 路

Input pressure range: 0-150psi

Accuracy: ＜ ± 2%

Repeatability: ＜ ± 0.15%

Display mode: 7-inch touch screen LCD display

Temperature control area: 8-way temperature control

Temperature control accuracy: ± 0.1 ℃ - ± 0.2 ℃

Temperature control range: Room temperature ± 8 ℃ -450 ℃, with increments of 1 ℃

Program heating: 16 stage program heating, heating rate 0.1-40 ℃/min, with increments of 0.1 ℃,

Initial and termination time range: 0-6000min, with increments of 1min.

Extreme temperature: protection value 450 ℃

External events: 8-channel external events can be equipped with solenoid valves, etc; Auxiliary control air circuit 2

Communication interface: Ethernet, IEEE802.3;

Start injection: manual and automatic

Power supply: 220V 50HZ 2000W

Technical specifications of detector

Hydrogen flame ionization detector (FID)
Detection limit: Mt ≤ 5 × 10-12g/s (n-hexadecane-isooctane solution);
Noise: ≤ 5 × 10-14A
Drift: ≤ 1 × 10-13A/30min
● Linear range: ≥ 106

Thermal conductivity detector (TCD):
Sensitivity: S ≥ 5000mV • ml/mg (conventional)

8000mV • ml/mg (highly sensitive) (benzene toluene solution)
Noise: ≤ 10 μ V
Baseline drift: ≤ 30 μ V/30min
● Linear range: ≥ 104

Electron Capture Detector (ECD):
Detection limit: ≤ 1 × 10-14g/s
Noise: ≤ 0.03mV
Baseline drift: ≤ 0.2mV/30min
● Linear range: ≥ 103
● Radioactive source: 63Ni

Flame photometric detector (FPD):
Detection limit: (S) ≤ 5 × 10-11g/s, (P) ≤ 1 × 10-12g/s;
Noise: ≤ 0.03mV
Baseline drift: ≤ 0.2mV/30min
● Linear range: ≥ 103 (S), 102 (P)