GB/T 30431-2013 English PDF (GBT30431-2013)

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GB/T 30431-2013: Gas chromatograph for laboratory
GB/T 30431-2013
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 17.180.99
N 52
Gas Chromatograph for Laboratory
ISSUED ON. DECEMBER 31, 2013
IMPLEMENTED ON. AUGUST 01, 2014
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 4
1 Scope ... 5
2 Normative References ... 5
3 Abbreviation ... 5
4 Requirements... 6
4.1 Normal working conditions of the instrument ... 6
4.2 Appearance requirements ... 6
4.3 Safety requirements ... 6
4.4 Sealing for airway system ... 7
4.5 Column heater temperature control system ... 7
4.6 Detector system ... 8
4.7 Capillary system ... 8
4.8 Instrument startup time ... 8
4.9 Qualitative repeatability of the instrument ... 8
4.10 Quantitative repeatability of the instrument ... 8
4.11 Transportation and storage of the instrument ... 8
4.12 Completeness of the instrument ... 9
5 Test Methods ... 9
5.1 Test conditions ... 9
5.2 Appearance inspection ... 10
5.3 Safety test of the instrument ... 10
5.4 Sealing of airway system ... 11
5.5 Test and calculation method of column heater ... 11
5.6 Detector system ... 14
5.7 Capillary system ... 21
5.8 Startup time ... 22
5.9 Qualitative repeatability of the instrument ... 22
5.10 Quantitative repeatability of the instrument ... 23
5.11 Transportation and storage test ... 23
5.12 Completeness of the instrument ... 23
6 Inspection Rules ... 23
6.1 Inspection classification ... 23
6.2 Exit-factory inspection ... 23
6.3 Type inspection ... 24
7 Marking, Package, Transportation and Storage ... 26
7.1 Marking of the instrument ... 26
7.2 Package ... 26
7.3 Transportation ... 27
7.4 Storage ... 27
Appendix A (Normative) Flow Rate Correction of Carrier Gas ... 28
Gas Chromatograph for Laboratory
1 Scope
This Standard specifies the requirements, test methods, inspection rules, marking,
package, transportation and storage of gas chromatograph for laboratory.
This Standard is applicable to the general gas chromatograph for laboratory
(hereinafter referred to as “instrument”).
2 Normative References
The following documents are essential to the application of this document. For the
dated documents, only the versions with the dates indicated are applicable to this
document; for the undated documents, only the latest version (including all the
amendments) are applicable to this document.
GB/T 191-2008 Packaging - Pictorial Marking for Handling of Goods (ISO
780.1997, MOD)
GB/T 2829-2002 Sampling Procedures and Tables for Periodic Inspection by
Attributes (Apply to Inspection of Process Stability)
GB 4793.1-2007 Safety Requirements for Electrical Equipment for Measurement,
Control, and Laboratory Use-Part 1. General Requirements (IEC 61010-1.2001,
IDT)
GB/T 11606-2007 Methods of Environmental Test for Analytical Instruments
GB/T 13384-2008 General Specifications for Packing of Mechanical and Electrical
Product
GB/T 30430-2013 Standard Column Used for Evaluating Gas Chromatography
3 Abbreviation
The following abbreviations are applicable to this document.
TCD. Thermal Conductivity Detector
4.3.2 Dielectric strength
The 1500V, 50Hz AC voltage shall be subjected to among the power phase, the
medium connecting line and casing of the instrument; there is no breakdown or arc-
over phenomena for 1min.
4.3.3 Protective grounding
The protection connection impedance of the instrument shall be no greater than 0.1Ω.
4.3.4 Safety protection sign of the instrument
For the instruments equipped with radioactive source detector, there shall have
radioactive source safety pattern and sign on the outside; the high-temperature heating
zone of the instrument shall have an anti-scald mark.
4.4 Sealing for airway system
4.4.1 Sealing for airway system of carrier gas
Under the condition of room temperature, the pressure drop within 30min is no greater
than 0.01MPa under the hydrogen pressure of 0.3MPa.
4.4.2 Sealing for airway system of fuel gas
Under the condition of room temperature, the pressure drop within 30min is no greater
than 0.01MPa under the hydrogen pressure of 0.3MPa.
4.4.3 Sealing for airway system of combustion-supporting gas
Under the condition of room temperature, the pressure drop within 30min is no greater
than 0.01MPa under the air pressure of 0.3MPa.
4.5 Column heater temperature control system
4.5.1 Temperature control range. 20°C~350°C above the room temperature.
4.5.2 Temperature stability. no greater than 0.5%.
4.5.3 Temperature gradient. no greater than 2.5%.
4.5.4 Minimum adjustment of the setting temperature. no greater than 1°C.
4.5.5 The deviation between the setting temperature and actual temperature shall not
exceed ±3%.
4.5.6 Programmed temperature-rise repeatability. no greater than 1%.
20°C; alternating heat and humidity. relative humidity is 95%, and temperature is 55°C;
the inclined drop height is 250mm; the number of collisions is 1000 times. After the test,
the package box shall not have heavy deformation or damage; the tested instrument
shall be free of the mechanical damages such as deformation, loosening, coating
peeling, etc.; inspect the instrument under the normal working conditions, it shall meet
the requirements of 4.2~4.10.
4.12 Completeness of the instrument
The complete set of the instruments shall include at least the following parts.
a) One host of the gas chromatograph;
b) One set of chromatographic data workstation or one recorder;
c) One set of necessary accessories and spare parts.
5 Test Methods
5.1 Test conditions
5.1.1 Test environmental conditions
See 4.1.
5.1.2 Test equipment and tool
The equipment and tool for instrument test include.
a) Contact current tester;
b) Withstand voltage tester. AC voltage (0~1500) V; frequency 50Hz;
c) Grounding resistance tester;
d) Pressure gauge;
e) Platinum resistance. Pt100(R (0) = 100Ω; W=0.00385);
f) Digital multimeter;
g) Thermometer. temperature resistance 400°C;
h) Stopwatch. the scale value 0.01s;
i) Chromatographic data workstation or recorder;
5.3.2 Dielectric strength
The power plug of the instrument shall not connect to the power grid; connect the high-
voltage output line of the withstand voltage tester with the live and neutral lines of the
instrument power plug; the low-potential output line (black) is connected to the
protective grounding terminal of the instrument power plug. Turn on the power switch
of the instrument; turn on the withstand voltage tester to increase the voltage gradually
to 1500V; keep for 1min; all parts of the instrument have no breakdown or arc-over
phenomena.
5.3.3 Protective grounding
It shall be performed as stipulated in 6.5.1.3 of GB 4793.1-2007.
5.3.4 Safety protection sign of the instrument
Visual inspection.
5.4 Sealing of airway system
5.4.1 Sealing for airway system of carrier gas
Connect the chromatographic column to the detector; block the outlet; connect the
pressure gauge to the system; inject the carrier gas (hydrogen) as per the analysis
procedure; use the regulating value to make the pressure behind the valve 0.3MPa;
shut off the gas source; make system stabilize for 5min; observe the pressure drop
after 30min.
5.4.2 Sealing for airway system of fuel gas
Inject the hydrogen from the fuel gas inlet; block its outlet; con...