GB/T 34097-2017 Determination of light stability of petroleum products

AI-translated method card — human verification pending. This is not an official translation of the standard. Unclear source values remain unverified; check the original standard and product certificate before use.

Card type: Test method

1. Method number / full title / English name / replacement relationship

• Standard number: GB/T 34097—2017
• Chinese title: Determination of light stability of petroleum products
• English title: Test method for light stability of petroleum products
• Replacement relationship: not provided in the available source (the word "replacement" is not seen on the first page or in the foreword)
• Publication / implementation: published in 2017-07-31, implemented in 2018-02-01
• Custodian: National Technical Committee for Standardization of Petroleum Products and Lubricants (SAC/TC 280) (source-text extraction appears as "!"#-./01234567"#89:;<=（ＳＡＣ／ＴＣ２８０）>'?@A", judged from SAC/TC 280, requires confirmation against the source standard (source-text extraction))
• Drafting organization: source-text extraction severely garbled, no recognizable name provided in the available source (requires confirmation against the source standard (source-text extraction))

2. Scope of application and non-application

• Applicable to: determination of light stability of petroleum products (the source states "!"#)0123(、7、¡、¢£¤¥4¦§¨©ª«", source-text extraction garbled, specific product categories require confirmation against the source standard (source-text extraction)).
• Not applicable to: no explicit "not applicable" clause is provided in the available source.
• Temperature conditions (visible in the source): +30 ℃～－16 ℃ (source-text extraction appears as "＋３０ÆÇ°È～－１６ÆÇ°È", requires confirmation against the source standard (source-text extraction)).
• Another clause mentions "ɬ®Ê1、Ë71、0Ì1©ÍÎ0123，ÏÐÑ1、561©Ò°0123", source-text extraction garbled, specific excluded objects require confirmation against the source standard (source-text extraction).

3. Method principle

• The source chapter 4 (xy) states: place the sample in a light stability tester, irradiate it for a specified time under specified light and temperature conditions, and measure the change in color (or color number) of the sample before and after irradiation to evaluate its light stability. source-text extraction is severely garbled, the specific mechanism statement requires confirmation against the source standard (source-text extraction).
• Term 3.1 "light stability light stability": the source defines it as "ò)’(óÖÓ，0123ôõö÷•%øùúû—ÎÉüýþÿ!8("，ÏÆÇ°È#$", source-text extraction garbled, requires confirmation against the source standard (source-text extraction).

4. Reagents and materials (purity / preparation)

• 6.1 Solvent / cleaning agent: µ¶·¸¹·，¯Âº­³´Ë7，Y»¼ (source-text extraction garbled, name and specifications require confirmation against the source standard (source-text extraction)).
• 6.2 Sample container / sample dish: ½¾#¿•;<(23 (source-text extraction garbled, requires confirmation against the source standard (source-text extraction)).
• 6.3 Wiping material: ÐÑ® (source-text extraction garbled, requires confirmation against the source standard (source-text extraction)).
• 6.4 Other materials: Ò® (source-text extraction garbled, requires confirmation against the source standard (source-text extraction)).
• Note: no explicit reagent purity grade or standard solution preparation steps are provided in the available source.

5. Apparatus and equipment

• 5.1 Light stability tester: composed of a light source, optical filter system, temperature control device, sample tray, etc.; temperature control range 85.0 ℃～95.0 ℃, temperature control accuracy 1.0 ℃, display accuracy 0.1 ℃; light intensity 12.0 mW/cm² ± 0.3 mW/cm²; strong radiation near the light source wavelength 365 nm (source-text extraction states "bGO•CP­×３６５ｎｍ†Qö÷•RST(0UVWX", requires confirmation against the source standard (source-text extraction)).
• 5.2 Light source lamp (mercury lamp): power 375 W, main wavelength 365 nm, lamp tube length 140 mm.
• 5.3 Ultraviolet radiometer (UV-A type): measurement range 320 nm～400 nm, peak wavelength 365 nm; the range should cover 12 mW/cm²; requires regular calibration (the source mentions "n”™ž(y!8hzj，{|}­9”uî~2ý，‚×”uî2ýƒ„ØÐ9 åv#", requires confirmation against the source standard (source-text extraction)).
• 5.4 Power supply / voltage stabilizer: 220 V, power not less than 2 kW, voltage stability 1%.
• 5.5 Thermometer / temperature measuring device: complies with the provisions of NB/SH/T 0905, upper limit of measurement range 99 ℃ (source-text extraction states "ÛTB‘９９℃，\56", requires confirmation against the source standard (source-text extraction)).
• 5.6 Timer: the source states "l9™：’#*“l9”4", source-text extraction garbled, requires confirmation against the source standard (source-text extraction).
• 5.7 Sample dish: outer diameter 40.0 mm ± 1.0 mm, inner diameter 44.0 mm (as stated in the source, suspected to be outer diameter/inner diameter interchanged, requires confirmation against the source standard (source-text extraction)), height 20.0 mm ± 0.5 mm, wall thickness 1.0 mm, bottom thickness 1.5 mm～2.0 mm, capacity approximately 22.0 mL～25.0 mL.
• 5.8 Sample tray / tray: diameter 55 mm ± 1 mm, thickness 2.5 mm ± 0.2 mm.
• 5.9 Measuring instrument: range 100 mm.
• 5.10 Oven: temperature control 90 ℃ (the source states "\TB‘９０℃?56", requires confirmation against the source standard (source-text extraction)).
• 5.11 Water bath / constant temperature device: temperature control 90 ℃ (the source states the same as above, requires confirmation against the source standard (source-text extraction)).
• 5.12 Thermometer: graduation value 0.5 ℃, measurement range 50 ℃～100 ℃.
• 5.13 Balance: sensitivity 1 mg.
• 5.14 Length measuring instrument: accuracy 0.02 mm.
• 5.15 Light source / lamp: 240 (unit unclear, suspected to be V or W, requires confirmation against the source standard (source-text extraction)).
• 5.16 Graduated cylinder: 100 mL.

6. Recommended operating conditions

• Temperature control: 85.0 ℃ ± 1.0 ℃ (clause 8.5).
• Light intensity: 12.0 mW/cm² ± 0.3 mW/cm² (clause 8.5).
• Irradiation time: 45 min ± 10 s (clause 8.8).
• Preheating / constant temperature: the sample and sample dish are kept at constant temperature under 85 ℃ ± 2 ℃ (clauses 8.2, 8.3).
• Light source wavelength: near 365 nm (clauses 5.1, 5.2).

7. Sampling and sample preparation

• 7.1 Sample dish loading: load the sample according to the provisions of 5.7, 5.8, the loading amount is based on the capacity of the sample tray (the source states ".23”0¦，b0UVWŒ，ÉÆJiÚ", source-text extraction garbled, requires confirmation against the source standard (source-text extraction)).
• 7.2 Sample preparation: the sample needs to be treated at about 20 ℃ (the source states "à２０áœ2*àâáã%Ã", requires confirmation against the source standard (source-text extraction)); waxy / viscous samples need to be heated first (the source states "#€ŸÂé£（‚œ2äÕJi、œ2•%:6¨ê‡’©）", requires confirmation against the source standard (source-text extraction)).
• Specific sampling amount and mixing steps: no explicit values are provided in the available source.

8. Analysis procedure

• 8.1 Install the light source according to the instrument instructions (the source states "$î€ïíMéê°¨˜(#›GŠ", requires confirmation against the source standard (source-text extraction)).
• 8.2 Preheat the sample, sample dish, sample tray and oven to 85 ℃ ± 2 ℃.
• 8.3 Inject the sample into the sample dish, place it in the oven at 85 ℃ ± 2 ℃ for constant temperature, the constant temperature time is not less than 1 h.
• 8.4 Turn on the light source, preheat until stable, and record the light source power.
• 8.5 Control the sample temperature at 90.0 ℃ ± 1.0 ℃, adjust the ultraviolet radiometer so that the light intensity is 12.0 mW/cm² ± 0.3 mW/cm², and start irradiation after stabilizing for 5 min.
• 8.6 During irradiation, keep the sample dish position fixed and avoid movement; after irradiation ends, take out the sample (the source states ""œ256%ø7F#'œ23$", source-text extraction garbled, requires confirmation against the source standard (source-text extraction)).
• 8.7 After irradiation ends, cool the sample to room temperature and observe the color change (the source states "òö÷•%øœ2é£F，–éVWZ[]56%ø7ªœ2^_", requires confirmation against the source standard (source-text extraction)).
• Remove the specimen after irradiation with 8.8 45 min ± 10 s; if the specimen temperature is too high, it must first be cooled to 85 ℃ ± 2 ℃ before removal; after removal, complete the color measurement within 3 min (original text "$˜™î€ï”’œ2(ÆÇ°È，‘Üm4”’３ÃÏb", requires confirmation against the source standard (source-text extraction)).

9. Qualitative and Quantitative Determination and Calculation Formula

• 9.1 The light stability is expressed by the change in color (or color number) of the specimen before and after irradiation (original text ".éê°¨˜m4”Æ(３áèîÉõé１áÆÇ°È(8¢#‹Åî，ç9‘Ù¢", source-text extraction garbled, requires confirmation against the source standard (source-text extraction)).
• 9.2 Expression of results: expressed as the difference between the color of the specimen after irradiation and the color of the unirradiated specimen (color number difference), in units of "number" (original text "#‹å”’:ᜟ;<FzT(;<（zҊ°）ŠÅœ2(•–’œŸ;<，ÏÆÇ°È#$", requires confirmation against the source standard (source-text extraction)).
• Specific calculation formula: no explicit mathematical formula is provided in the available source.

10. Precision

• 10.1 Repeatability: for two consecutive determinations of the same specimen by the same operator using the same instrument, the difference between the two results shall not exceed 1.5 number (original text "BÆ(:ÃA,”œ;<,èÉj®１．５ÆÇ°È", requires confirmation against the source standard (source-text extraction)), confidence level 95%.
• 10.2 Reproducibility: for two determinations of the same specimen by different operators using different instruments, the difference between the two results shall not exceed the value specified in Table 1 (original text "BÆ(:áA,”œ;<,èÉj®#１æÔ¢î", requires confirmation against the source standard (source-text extraction)), confidence level 95%.
• Table 1 Precision of light stability determination (original text Table 1):

• 10.3 Other: original text "Dè：-®• – ’ — Ù – é ’ ñ % & > ï ù Æ + (，E Ü $ ! > ï œ Ÿ ¡ Æ + ( ; < F JDè", source-text extraction garbled, requires confirmation against the source standard (source-text extraction).

11. Report

• Report the light stability (color number) of the specimen in accordance with 9.2; state the specimen name, number, test conditions (temperature, light intensity, irradiation time, etc.) and any deviations from this standard (original text "$９．２GHœ2(•–’œŸ;<；×®0´23，­®IJ•–’—Ù؍Ž¨Ø(23"#9，$w7ＡGH", requires confirmation against the source standard (source-text extraction)).
• Annex A gives the format for the light stability determination report (Table A.1):

12. Normative References

• GB/T 1.1—2009 Directives for standardization work (mentioned in the foreword, source-text extraction appears as "ＧＢ／Ｔ１．１—２００９")
• NB/SH/T 0905 Petroleum products—Determination of color (original text "ＮＢ／ＳＨ／Ｔ０９０５　0123°(　éêëìíîï", name requires confirmation against the source standard (source-text extraction))
• GB/T 3555 Petroleum products—Determination of Saybolt color (Saybolt chromometer method) (reference [1]: "ＧＢ／Ｔ３５５５　0123ÆÇ°”’ï（ÆÇ¢°lï）", requires confirmation against the source standard (source-text extraction))
• Term 3.2 cites NB/SH/T 0905—2015 Clause 3.5 (original text "［ＮＢ／ＳＨ／Ｔ０９０５—２０１５，’ñ３．５］")

13. Source and verification

This page is an AI translation of the available Chinese method card. Human verification is pending. It is not an official translation of the standard. Check the source standard and product certificate before use.

14. Quick Reference Q&A