GB/T 7999-2026 Photoelectric direct reading atomic emission spectrometric method of aluminium and aluminium alloys English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered.
ICS
CCS
National Standard of the People's Republic of China
GB/T 7999-2026
Photoelectric direct reading atomic emission spectrometric method of aluminium and aluminium alloys
铝及铝合金光电直读原子发射光谱分析方法
Issue date: 2026-01-28 Implementation date: 2027-02-01
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents and materials
6 Apparatus
7 Samples
8 Spectrometer test conditions
9 Calibration
10 Test procedure
11 Data processing of test results
12 Precision
13 Test report
Standard practice for photoelectric direct-reading atomic emission spectrometric analysis of aluminium and aluminium alloys
1 Scope
This document describes the photoelectric direct-reading atomic emission spectrometric method for the analysis of alloying elements and impurity elements in aluminium and aluminium alloys.
This document is applicable to the determination of antimony (Sb), arsenic (As), beryllium (Be), bismuth (Bi), boron (B), cadmium (Cd), calcium (Ca), cerium (Ce), chromium (Cr), cobalt (Co), copper (Cu), gallium (Ga), iron (Fe), lead (Pb), lithium (Li), magnesium (Mg), manganese (Mn), molybdenum (Mo), nickel (Ni), phosphorus (P), scandium (Sc), silicon (Si), silver (Ag), sodium (Na), strontium (Sr), tin (Sn), titanium (Ti), vanadium (V), zinc (Zn), zirconium (Zr) and other elements in aluminium and aluminium alloys. It is also applicable to the composition analysis of recycled aluminium and aluminium alloy raw materials. The determination ranges are shown in Table 1.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 8005.1, Aluminium and aluminium alloy terms — Part 1: Products and methods of processing and treatment
GB/T 8170, Rules of rounding off for numerical values and expression and judgement of limiting values
GB/T 14203, General rules for spark discharge atomic emission spectrometry
GB/T 17432, Methods for sampling for chemical composition analysis of wrought aluminium and aluminium alloys
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 8005.1 and GB/T 14203 apply.
4 Principle
In an argon atmosphere, the sample is excited by a spark source, causing electrons of the elements to transition between different energy levels. When electrons transition from higher to lower energy levels, characteristic spectral lines are emitted. The spectral intensities of characteristic lines of the elements to be determined and the internal standard element are measured. The content of the element to be determined is calculated by the data processing system through a calibration curve based on the relative intensity ratios of the analytical lines.
5 Reagents and materials
5.1 Counter electrode
The counter electrode shall preferably be a round rod of tungsten, silver or copper with a diameter of 4 mm to 8 mm and a length of 30 mm to 150 mm, with one end shaped into a cone to obtain a stable discharge. For the analysis of pure aluminium (wAl ≥ 99.9 %), an electrode of 1 mm diameter may also be used.
5.2 Gas
Argon (volume fraction not less than 99.995 %).
5.3 Coolant
Anhydrous ethanol, etc.
5.4 Reference materials
5.4.1 Calibration reference materials
Used to establish the calibration curve. Certified reference materials shall be used, with a composition and processing procedure consistent with or similar to the test samples. The reference materials shall cover the determination ranges of all elements to be determined, and the mass fractions should preferably maintain an appropriate gradient, typically as a series of reference materials.
5.4.2 Drift correction samples (standardization samples)
Used to correct the deviation of spectrometer measurements from the calibration curve caused by various factors. Drift correction samples shall be homogeneous and able to produce stable spectral line intensities.
5.4.3 Control samples
The chemical composition, structure and processing procedure of control samples shall be consistent with or similar to the test samples. Certified reference materials or self-prepared samples may be used. Self-prepared samples shall be certified by accurate and reliable methods.
6 Apparatus
6.1 Sample preparation equipment
Lathes, milling machines, etc.
6.2 Photoelectric direct-reading atomic emission spectrometer
6.2.1 The photoelectric direct-reading atomic emission spectrometer (hereinafter referred to as the "spectrometer") shall be placed in a room free from electromagnetic interference and vibration. The room temperature shall be maintained at 15 °C to 30 °C, and the relative humidity shall be less than 80 %. The temperature variation within the room should preferably not exceed 5 °C.
6.2.2 To ensure the stability of the spectrometer, a voltage regulator or stabilizer should preferably be used, and a dedicated grounding wire shall be provided.
6.2.3 Exhaust gases and dust generated during the test shall not be discharged directly into the room. The filter system of the spectrometer shall be cleaned or replaced regularly.
7 Samples
7.1 Sample requirements
7.1.1 The size of the sample shall cover the spark aperture of the excitation stand.
7.1.2 The sample shall be homogeneous, free from porosity, inclusions, cracks and similar defects.
7.1.3 Other requirements shall be in accordance with GB/T 17432.
7.2 Sample preparation
7.2.1 Samples shall be prepared in accordance with GB/T 17432.
7.2.2 Overheating shall be avoided during preparation; coolant may be used for cooling.
7.2.3 The test surface of the sample shall be free from oxidation, porosity and other foreign materials, and shall be free from oil stains and other contaminants.
7.2.4 Drift correction samples, control samples and test samples should preferably be prepared simultaneously under the same conditions. Testing should preferably be completed within 8 hours after preparation.
8 Spectrometer test conditions
8.1 Calibration of the spectrometer
The spectrometer shall be metrologically calibrated, with a calibration interval not exceeding 24 months.
8.2 Adjustment of the excitation system
8.2.1 Counter electrode
The counter electrode shall be cleaned and replaced regularly according to actual conditions. During non-excitation periods, the excitation hole shall be covered to protect the counter electrode.
8.2.2 Electrode gap
The gap between the sample and the counter electrode shall be checked regularly using a gap gauge.
8.2.3 Gas supply system
The argon gas supply system shall be as short as possible, with no leakage at connections. The gas flow rate shall be adjusted so that the flow during excitation reaches the argon flow rate specified by the spectrometer, and a minimum flow may be maintained during non-operating periods.
8.3 Adjustment of the optical system
8.3.1 Focusing lens or quartz protective window
The focusing lens or quartz protective window shall be cleaned when contaminated. Contamination may be judged by the degree of decrease in spectral intensity of the elements being determined.
8.3.2 Optical chamber pressure
The pressure of the vacuum optical chamber shall meet the instrument requirements. The gas-filled optical chamber shall be protected by high-purity inert gas. To ensure the purity of the protective gas in the gas-filled optical chamber, the gas pressure inside the optical chamber shall be slightly higher than atmospheric pressure and maintained constant.
8.3.3 Profile adjustment
The position of the entrance slit is adjusted by profile adjustment to maximize the intensity of the spectrum entering the slit from the light source.
8.4 Adjustment of the photometric system
8.4.1 Pre-burn time
Appropriate pre-burn time shall be determined through preliminary testing.
8.4.2 Integration time
The integration time shall be determined through testing based on precision requirements such as time and analytical line intensity.
Standard
GB/T 7999-2026 Photoelectric direct reading atomic emission spectrometric method of aluminium and aluminium alloys (English)
Standard No.
GB/T 7999-2026
Status
to be valid
Language
English
File Format
PDF
Word Count
9000 words
Translation Price(USD)
270.0
Implemented on
2026-12-1
Delivery
via email in 1~3 business day
Detail of GB/T 7999-2026
Standard No.
GB/T 7999-2026
English Name
Photoelectric direct reading atomic emission spectrometric method of aluminium and aluminium alloys
GB/T 7999-2026 Photoelectric direct reading atomic emission spectrometric method of aluminium and aluminium alloys English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered.
ICS
CCS
National Standard of the People's Republic of China
GB/T 7999-2026
Photoelectric direct reading atomic emission spectrometric method of aluminium and aluminium alloys
铝及铝合金光电直读原子发射光谱分析方法
Issue date: 2026-01-28 Implementation date: 2027-02-01
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents and materials
6 Apparatus
7 Samples
8 Spectrometer test conditions
9 Calibration
10 Test procedure
11 Data processing of test results
12 Precision
13 Test report
Standard practice for photoelectric direct-reading atomic emission spectrometric analysis of aluminium and aluminium alloys
1 Scope
This document describes the photoelectric direct-reading atomic emission spectrometric method for the analysis of alloying elements and impurity elements in aluminium and aluminium alloys.
This document is applicable to the determination of antimony (Sb), arsenic (As), beryllium (Be), bismuth (Bi), boron (B), cadmium (Cd), calcium (Ca), cerium (Ce), chromium (Cr), cobalt (Co), copper (Cu), gallium (Ga), iron (Fe), lead (Pb), lithium (Li), magnesium (Mg), manganese (Mn), molybdenum (Mo), nickel (Ni), phosphorus (P), scandium (Sc), silicon (Si), silver (Ag), sodium (Na), strontium (Sr), tin (Sn), titanium (Ti), vanadium (V), zinc (Zn), zirconium (Zr) and other elements in aluminium and aluminium alloys. It is also applicable to the composition analysis of recycled aluminium and aluminium alloy raw materials. The determination ranges are shown in Table 1.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 8005.1, Aluminium and aluminium alloy terms — Part 1: Products and methods of processing and treatment
GB/T 8170, Rules of rounding off for numerical values and expression and judgement of limiting values
GB/T 14203, General rules for spark discharge atomic emission spectrometry
GB/T 17432, Methods for sampling for chemical composition analysis of wrought aluminium and aluminium alloys
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 8005.1 and GB/T 14203 apply.
4 Principle
In an argon atmosphere, the sample is excited by a spark source, causing electrons of the elements to transition between different energy levels. When electrons transition from higher to lower energy levels, characteristic spectral lines are emitted. The spectral intensities of characteristic lines of the elements to be determined and the internal standard element are measured. The content of the element to be determined is calculated by the data processing system through a calibration curve based on the relative intensity ratios of the analytical lines.
5 Reagents and materials
5.1 Counter electrode
The counter electrode shall preferably be a round rod of tungsten, silver or copper with a diameter of 4 mm to 8 mm and a length of 30 mm to 150 mm, with one end shaped into a cone to obtain a stable discharge. For the analysis of pure aluminium (wAl ≥ 99.9 %), an electrode of 1 mm diameter may also be used.
5.2 Gas
Argon (volume fraction not less than 99.995 %).
5.3 Coolant
Anhydrous ethanol, etc.
5.4 Reference materials
5.4.1 Calibration reference materials
Used to establish the calibration curve. Certified reference materials shall be used, with a composition and processing procedure consistent with or similar to the test samples. The reference materials shall cover the determination ranges of all elements to be determined, and the mass fractions should preferably maintain an appropriate gradient, typically as a series of reference materials.
5.4.2 Drift correction samples (standardization samples)
Used to correct the deviation of spectrometer measurements from the calibration curve caused by various factors. Drift correction samples shall be homogeneous and able to produce stable spectral line intensities.
5.4.3 Control samples
The chemical composition, structure and processing procedure of control samples shall be consistent with or similar to the test samples. Certified reference materials or self-prepared samples may be used. Self-prepared samples shall be certified by accurate and reliable methods.
6 Apparatus
6.1 Sample preparation equipment
Lathes, milling machines, etc.
6.2 Photoelectric direct-reading atomic emission spectrometer
6.2.1 The photoelectric direct-reading atomic emission spectrometer (hereinafter referred to as the "spectrometer") shall be placed in a room free from electromagnetic interference and vibration. The room temperature shall be maintained at 15 °C to 30 °C, and the relative humidity shall be less than 80 %. The temperature variation within the room should preferably not exceed 5 °C.
6.2.2 To ensure the stability of the spectrometer, a voltage regulator or stabilizer should preferably be used, and a dedicated grounding wire shall be provided.
6.2.3 Exhaust gases and dust generated during the test shall not be discharged directly into the room. The filter system of the spectrometer shall be cleaned or replaced regularly.
7 Samples
7.1 Sample requirements
7.1.1 The size of the sample shall cover the spark aperture of the excitation stand.
7.1.2 The sample shall be homogeneous, free from porosity, inclusions, cracks and similar defects.
7.1.3 Other requirements shall be in accordance with GB/T 17432.
7.2 Sample preparation
7.2.1 Samples shall be prepared in accordance with GB/T 17432.
7.2.2 Overheating shall be avoided during preparation; coolant may be used for cooling.
7.2.3 The test surface of the sample shall be free from oxidation, porosity and other foreign materials, and shall be free from oil stains and other contaminants.
7.2.4 Drift correction samples, control samples and test samples should preferably be prepared simultaneously under the same conditions. Testing should preferably be completed within 8 hours after preparation.
8 Spectrometer test conditions
8.1 Calibration of the spectrometer
The spectrometer shall be metrologically calibrated, with a calibration interval not exceeding 24 months.
8.2 Adjustment of the excitation system
8.2.1 Counter electrode
The counter electrode shall be cleaned and replaced regularly according to actual conditions. During non-excitation periods, the excitation hole shall be covered to protect the counter electrode.
8.2.2 Electrode gap
The gap between the sample and the counter electrode shall be checked regularly using a gap gauge.
8.2.3 Gas supply system
The argon gas supply system shall be as short as possible, with no leakage at connections. The gas flow rate shall be adjusted so that the flow during excitation reaches the argon flow rate specified by the spectrometer, and a minimum flow may be maintained during non-operating periods.
8.3 Adjustment of the optical system
8.3.1 Focusing lens or quartz protective window
The focusing lens or quartz protective window shall be cleaned when contaminated. Contamination may be judged by the degree of decrease in spectral intensity of the elements being determined.
8.3.2 Optical chamber pressure
The pressure of the vacuum optical chamber shall meet the instrument requirements. The gas-filled optical chamber shall be protected by high-purity inert gas. To ensure the purity of the protective gas in the gas-filled optical chamber, the gas pressure inside the optical chamber shall be slightly higher than atmospheric pressure and maintained constant.
8.3.3 Profile adjustment
The position of the entrance slit is adjusted by profile adjustment to maximize the intensity of the spectrum entering the slit from the light source.
8.4 Adjustment of the photometric system
8.4.1 Pre-burn time
Appropriate pre-burn time shall be determined through preliminary testing.
8.4.2 Integration time
The integration time shall be determined through testing based on precision requirements such as time and analytical line intensity.
