ISO 3735:1999 PDF

Crude petroleum and fuel oils — Determination of sediment — Extraction method

Название (английский):

ISO 3735:1999

Crude petroleum and fuel oils — Determination of sediment — Extraction method

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 7
Дата публикации:: 25 марта 1999 г.
Издание:: ISO IS 3735 edition 2 version 1
ICS:: 75.040

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Описание (английский):

La présente Norme internationale prescrit une méthode de détermination de la teneur en sédiments du pétrole brut et des fuel-oils par extraction au toluène. La fidélité s'applique à un intervalle de teneur en sédiments compris entre 0,01 % (m/m) et 0,40 % (m/m), bien que des niveaux plus élevés puissent être déterminés. NOTE 1 Si la présente Norme internationale est appliquée aux échantillons de pétrole brut contenant des quantités significatives de sels, une surestimation de la teneur en sédiments peut être obtenue parce qu'une certaine quantité des sels non organiques peut être retenue dans la cartouche d'extraction. Ce problème n'est en général pas significatif pour les échantillons de pétrole brut contenant moins de 0,1 % (m/m) de sels totaux. NOTE 2 Pour les besoins de la présente Norme internationale, les termes «% (m/m») et «% (V/V)» sont utilisés pour représenter respectivement les fractions massiques et volumiques des produits.

Технические детали

Технический комитет: ISO/TC 28 - Petroleum and related products, fuels and lubricants from natural or synthetic sources
SKU: ISO 3735:1999

Abstract

Overview

ISO 3735:1999 specifies a standardized extraction method for the determination of sediment in crude petroleum and fuel oils. The method uses hot toluene extraction of a measured test portion in a refractory extraction thimble, with results reported as percentage by mass (sediment by extraction). The procedure is designed for sediment levels typically in the range 0.01 % (m/m) to 0.40 % (m/m), although higher concentrations can be measured.

Key topics and requirements

Principle: Extract the test portion in a porous thimble with hot toluene until the residue reaches constant mass.
Reagents: Methylbenzene (toluene), ISO 5272 grade 2.
Test portion: ≈10 g taken immediately after thorough mixing; do not pre-weigh to an exact mass.
Apparatus:
- Extraction flask (1 L Erlenmeyer with ≥50 mm neck).
- Condensing coil (metal coil on lid) and thimble basket.
- Extraction thimble: refractory, pore size index P16 (ISO 4793), 25 mm × 70 mm, mass 15–17 g.
- Heater (hotplate preferred), oven (115–120 °C), desiccator for cooling, analytical balance (0.1 mg).
Extraction details:
- Add 150–200 ml toluene; extract about 30 min after solvent from thimble runs colourless.
- Ensure toluene/oil level in thimble stays ≤ 20 mm from top.
- For samples >10 % (V/V) water, use a water cup to collect azeotroped water.
- Dry thimble 1 h at 115–120 °C, cool 1 h, weigh to 0.1 mg; repeat extractions until two successive masses differ ≤ 0.2 mg.
Calculation: Sediment S (%) = (m3 − m1) / (m2 − m1) × 100, where m1 = empty thimble, m2 = thimble + test portion, m3 = thimble + sediment.
Reporting: Round to nearest 0.01 % (m/m); state mixing procedure and sample temperatures before and after mixing.
Precision: Reproducibility given as R = 0.033 + 0.255 S (S in % mass); see clause 11 for repeatability/reproducibility guidance.
Caveats: Samples with significant inorganic salts can yield overestimated sediment because salts may be retained in the thimble. The method involves hazardous solvents-observe safety practices.

Applications and users

ISO 3735:1999 is used by:

Petroleum testing laboratories and quality control (QC) teams
Crude oil producers, refiners and fuel manufacturers
Pipeline operators, marine bunkering inspectors and fuel traders
Regulatory and compliance bodies monitoring fuel quality

Use cases include batch acceptance testing, custody transfer checks, and routine QC to quantify insoluble sediment that can affect refining, fuel handling and engine performance.

Related standards

ISO 3170 / ISO 3171 - Sampling of petroleum liquids (manual and automatic)
ISO 4793 - Sintered filters (thimble porosity classification)
ISO 5272 - Toluene specifications
ISO 1773 - Laboratory glassware (boiling flasks)

Keywords: ISO 3735:1999, sediment determination, toluene extraction, crude petroleum, fuel oils, extraction thimble, sediment by extraction, petroleum testing, fuel quality.

Overview

Key topics and requirements

Principle: Extract the test portion in a porous thimble with hot toluene until the residue reaches constant mass.
Reagents: Methylbenzene (toluene), ISO 5272 grade 2.
Test portion: ≈10 g taken immediately after thorough mixing; do not pre-weigh to an exact mass.
Apparatus:
- Extraction flask (1 L Erlenmeyer with ≥50 mm neck).
- Condensing coil (metal coil on lid) and thimble basket.
- Extraction thimble: refractory, pore size index P16 (ISO 4793), 25 mm × 70 mm, mass 15–17 g.
- Heater (hotplate preferred), oven (115–120 °C), desiccator for cooling, analytical balance (0.1 mg).
Extraction details:
- Add 150–200 ml toluene; extract about 30 min after solvent from thimble runs colourless.
- Ensure toluene/oil level in thimble stays ≤ 20 mm from top.
- For samples >10 % (V/V) water, use a water cup to collect azeotroped water.
- Dry thimble 1 h at 115–120 °C, cool 1 h, weigh to 0.1 mg; repeat extractions until two successive masses differ ≤ 0.2 mg.
Calculation: Sediment S (%) = (m3 − m1) / (m2 − m1) × 100, where m1 = empty thimble, m2 = thimble + test portion, m3 = thimble + sediment.
Reporting: Round to nearest 0.01 % (m/m); state mixing procedure and sample temperatures before and after mixing.
Precision: Reproducibility given as R = 0.033 + 0.255 S (S in % mass); see clause 11 for repeatability/reproducibility guidance.
Caveats: Samples with significant inorganic salts can yield overestimated sediment because salts may be retained in the thimble. The method involves hazardous solvents-observe safety practices.

Applications and users

ISO 3735:1999 is used by:

Petroleum testing laboratories and quality control (QC) teams
Crude oil producers, refiners and fuel manufacturers
Pipeline operators, marine bunkering inspectors and fuel traders
Regulatory and compliance bodies monitoring fuel quality

Use cases include batch acceptance testing, custody transfer checks, and routine QC to quantify insoluble sediment that can affect refining, fuel handling and engine performance.

Related standards

ISO 3170 / ISO 3171 - Sampling of petroleum liquids (manual and automatic)
ISO 4793 - Sintered filters (thimble porosity classification)
ISO 5272 - Toluene specifications
ISO 1773 - Laboratory glassware (boiling flasks)

Keywords: ISO 3735:1999, sediment determination, toluene extraction, crude petroleum, fuel oils, extraction thimble, sediment by extraction, petroleum testing, fuel quality.

ISO 3735:1999 PDF

Технические детали

Abstract

Overview

Key topics and requirements

Applications and users

Related standards

Похожие стандарты

Abstract

Overview

Key topics and requirements

Applications and users

Related standards

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