QT-3000 light hydrocarbon analysis is a capillary gas chromatography instrument specifically designed for light hydrocarbon analysis. It can subdivide more than 100 components in light hydrocarbons and obtain qualitative and quantitative results. This instrument has strong specialized functions, short analysis cycle, fast analysis speed, and can achieve near room temperature control.

Strong specialized functions can provide optimal operating conditions for light hydrocarbon analysis. The column box temperature of the instrument is a key factor affecting the analysis of light hydrocarbons. It not only requires high temperature control accuracy, but also has a relatively low starting temperature for programmed heating, about 35 ℃, which is very close to room temperature. However, most domestic instruments do not have near room temperature control function, and the temperature control is not stable enough. High end foreign instruments are equipped with refrigeration devices, but the structure of the instruments is complex and expensive, and can only be used in laboratories. This instrument has designed a unique column box structure and adopted some practical and effective technologies. The lowest controllable temperature of the column box reaches room temperature plus 5 ℃, and the control accuracy reaches ± 0.1 ℃.

Short analysis cycle, fast analysis speed, and improved instrument utilization. The instrument analysis cycle consists of two parts: the analysis process and the reset process. Improving the speed of the analysis process is a common goal that everyone strives for, but the potential in this area is limited. The reset process of the instrument is very time-consuming. During the reset, the temperature of the column box needs to be reduced from above 150 ℃ to 35 ℃ and reach stability. The common instrument analysis process only takes 30-40 minutes, while the reset time takes 1 hour or even longer. Mainly because the closer it is to room temperature, the slower the cooling. Due to the unique structure of the column box used in this instrument, the column temperature drops from 150 ℃ to 35 ℃ and reaches stability at room temperature of 25 ℃, which takes about 10 minutes.

The unique water driven sampling six way valve injection system of this instrument: This instrument can be injected with a syringe, and for the top gas of the rock debris tank, a specially configured water driven sampling six way valve injection system can also be used for operation. This injection method is easy to operate, has small errors, good repeatability, and accurate qualitative and quantitative analysis results.

A flexible and convenient chromatographic qualitative and quantitative software that facilitates the processing, interpretation, and evaluation of light hydrocarbon data, providing a convenient operating system for on-site operators.

The overall design of the instrument is innovative, unique, practical, stable, and reliable. The software is easy to operate and can meet the needs of on-site and laboratory analysis.

1. Temperature control

(1) Column temperature:

Temperature control range: room temperature plus+5 ℃ to 250 ℃;

Temperature control accuracy: better than ± 0.1 ℃;

Within the effective area of the column chamber, not more than 1%;

The deviation between the set temperature and the indicated temperature shall not exceed 0.1 ℃;

The deviation between the set temperature and the actual temperature shall not exceed 2.5%;

Maximum heating order: 4 orders;

Heating rate: 0-20 ℃/min;

Cooling rate: The time required for the temperature to drop from 180 ℃ to 35 ℃ should not exceed 8 minutes.

(2) Temperature of vaporization chamber and detection chamber: Temperature control accuracy:

Vaporization chamber: ± 1 ℃; Testing room: ±1℃；

The deviation between the set temperature and the indicated temperature should not exceed 1 ℃.

2. Hydrogen flame ionization detector:

(1) Detection limit: not greater than 1 × 10-11G/s (benzene);

(2) Drift: not greater than 0.5mv/h;

(3) Start time: no more than 2 hours.