ايزو 11890-2-2020 “الدهانات والورنيشات – Determination of volatile organic compounds (VOC) content – جزء 2- Gas chromatography”
مقدمة
ايزو (المنظمة الدولية للتوحيد القياسي) هو تحالف عالمي لهيئات المعايير الوطنية (الهيئات الأعضاء في منظمة الأيزو). عادة ما يتم تطوير المعايير الدولية من خلال اللجان الفنية ISO. يحق لكل مؤسسة عضو مهتمة بموضوع تم تشكيل لجنة فنية له أن تكون ممثلة في اللجنة. وتشارك أيضًا المنظمات الدولية الحكومية وغير الحكومية التي تتواصل مع منظمات التقييس في هذا العمل. تعمل ISO بشكل وثيق مع اللجنة الكهروتقنية الدولية (اللجنة الانتخابية المستقلة) في جميع المسائل المتعلقة بالتوحيد الكهربائي.
يتم وصف الإجراءات المستخدمة لتطوير هذه الوثيقة بالإضافة إلى تلك المستخدمة لمزيد من الصيانة في الجزء 1 لتوجيهات ISO/IEC. بخاصة, وينبغي إيلاء الاهتمام لمعايير الموافقة المختلفة المطلوبة لأنواع مختلفة من وثائق ISO. تمت صياغة هذه الوثيقة وفقًا لقواعد التحرير في الجزء 2 لتوجيهات ISO/IEC (راجع iso.org/directives).
ايزو 11890-2-2020 “الدهانات والورنيشات – Determination of volatile organic compounds (VOC) content – جزء 2- Gas chromatography”
يرجى ملاحظة أن بعض محتويات هذه الوثيقة قد تكون خاضعة لحقوق براءات الاختراع. ISO ليست مسؤولة عن تحديد أي أو كل حقوق براءات الاختراع هذه. تفاصيل أي حقوق براءة اختراع تم تحديدها أثناء تطوير الوثيقة ستكون في المقدمة و/أو في قائمة ISO الخاصة بمطالبات براءات الاختراع المستلمة (راجع iso.org/patents).
يتم تقديم أي أسماء تجارية مستخدمة في هذه الوثيقة كمعلومات لراحة المستخدم ولا تشكل مصادقة.
طوعي, المعايير ذات الصلة وتقييم المطابقة ذات الصلة بمصطلحات ISO المحددة وتعبر عن معنى ISO في الحواجز الفنية أمام التجارة (TBT) الالتزام بمبادئ منظمة التجارة العالمية (منظمة التجارة العالمية) معلومة, يرجى الاطلاع على iso.org/iso/foreword.html.
This document has been prepared by Technical Committee ISO/TC 35 (Paints and Varnishes) in cooperation with Technical Committee CEN/TC 139 (Paints and Varnishes) of the European Committee for Standardization (CEN) in accordance with the Technical Cooperation Agreement (Vienna Agreement) between ISO and CEN.
The fourth edition cancels and replaces the technically revised third edition (ايزو 11890-2:2013).
ايزو 11890-2-2020 “الدهانات والورنيشات – Determination of volatile organic compounds (VOC) content – جزء 2- Gas chromatography”
Compared with the previous edition, the main changes are as follows:
– The scope has been expanded to include the determination of semi-volatile organic compounds (SVOC);
— The range has been expanded to include concentrations ranging from 0.01% ل 100%;
– Added specification for the determination of semi-volatile organic compounds.
A list of all parts in the ISO 11890 يمكن العثور على السلسلة على موقع ISO.
يجب توجيه أي تعليقات أو أسئلة بخصوص هذه الوثيقة إلى هيئة المعايير الوطنية للمستخدم. يمكن العثور على القائمة الكاملة لهذه الوكالات على الرابط iso.org/members.html.
مقدمة
This document is one of a series of standards dealing with the sampling and testing of coating materials and their raw materials. It provides a method for the determination of volatile organic compound (VOC) content and semi-volatile organic compound (SVOC) content of coating materials and their raw materials.
Warnings Use of this document may involve hazardous materials, operations, and equipment. This document is not intended to address all security concerns associated with its use. It is the responsibility of the user of this document to take appropriate steps to ensure the safety and health of personnel before applying the document and to determine whether any other restrictions are applicable for this purpose.
ايزو 11890-2-2020 “الدهانات والورنيشات – Determination of volatile organic compounds (VOC) content – جزء 2- Gas chromatography”
1 نِطَاق
This document is suitable for the determination of VOC and/or SVOC with an expected VOC and SVOC content greater than 0.01 % (كتلة) ل 100 %.
The method given in ISO 11890-1 is used when the VOC mass is greater than 15%. This document (method ISO 11890-2) is applicable when the system contains both VOC and SVOC, as the VOC results of ISO 11890-1 May be affected by SVOC. For VOC content of less than 0.1%, the headspace method described in ISO 17895 was used as an alternative. ايزو 11890-1 و ايزو 17895 cannot be used to determine SVOC content.
ملحوظة 1 Certain components of coating materials and their raw materials can decompose and cause artificial VOC and/or SVOC signals during analysis. These signals are artifacts of the method and are not taken into account when determining the VOC and/or SVOC of coating materials and their raw materials (examples are given in Annex B).
This method assumes that the volatile matter is water or organic matter. لكن, other volatile inorganic compounds may be present and may need to be quantified by another suitable method and allowed in the calculations. The methods defined in this document are not applicable to the determination of moisture content.
ملحوظة 2 If organic acids or bases and their corresponding salts are present in the coating material or its raw materials, the amount quantified by this method may not be accurate due to changes in the acid or base balance.
ايزو 11890-2-2020 “الدهانات والورنيشات – Determination of volatile organic compounds (VOC) content – جزء 2- Gas chromatography”
2 المراجع المعيارية
The following documents are referenced in the text in such a way that some or all of their contents constitute the requirements of this document. للمراجع المؤرخة, تنطبق النسخة المذكورة فقط. للمراجع غير المؤرخة, النسخة الجديدة من المرجع (بما في ذلك أي مراجعات) ينطبق.
ايزو 760, Determination of moisture – Karl Fischer method (general method)
ايزو 1513, الدهانات والورنيشات – فحص وإعداد عينات الاختبار
ايزو 2811 (all parts), الدهانات والورنيشات — Determination of density
ايزو 15528, الدهانات, الورنيش والمواد الخام للدهانات والورنيش – أخذ العينات
ايزو 11890-2-2020 “الدهانات والورنيشات – Determination of volatile organic compounds (VOC) content – جزء 2- Gas chromatography”
3 المصطلحات والتعاريف
لأغراض هذه الوثيقة, تنطبق المصطلحات والتعاريف التالية.
تحتفظ ISO وIEC بقواعد بيانات المصطلحات للتوحيد القياسي في العناوين التالية:
– منصة ISO للتصفح عبر الإنترنت: متاح على iso.org/obp
– IEC الموسوعة الإلكترونية: متاح في Electropedia.org/
3.1 Volatile Organic Compounds
Volatile organic compounds
Any organic liquid and/or solid that evaporates spontaneously at the prevailing temperature and pressure of the atmosphere with which it is in contact
ملحوظة 1: For current usage of the term VOC in the field of coatings, see Volatile Organic Compound content (VOC content) (3.4).
ملحوظة 2: Under U.S. government legislation, the term VOC is limited to those compounds that are photochemically active in the atmosphere (see ASTM D3960). Any other compound is then defined as an exempt compound (3.6).
[مصدر: ايزو 4618:2014, 2.270]
3.2 Semi-volatile organic compounds
SVOC
Organic liquids and/or solids, spontaneously evaporate at the prevailing temperature and pressure of the atmosphere in contact with them, but more slowly than vocs
ملحوظة 1: For current usage of the term SVOC in the field of coating materials, see semi-volatile Organic Compound Content (SVOC content) (3.5).
ايزو 11890-2-2020 “الدهانات والورنيشات – Determination of volatile organic compounds (VOC) content – جزء 2- Gas chromatography”
3.3 Non-volatile organic compounds
Non-vessel carrier
Organic liquids and/or solids not classified as VOC or SVOC
3.4 Volatile organic compound content
Volatile organic compound content
Volatile organic compounds
The quality of volatile organic compounds (3.1) present in the coating material as determined under the specified conditions
ملحوظة 1: The nature and number of compounds to be considered will depend on the application area of the coating material. For each application area, limit values as well as determination or calculation methods are specified by regulation or agreement.
ملحوظة 2: If the term VOC refers to a compound with a specified maximum boiling point, compounds considered as part of the VOC content are those whose boiling point is below and includes this limit, while compounds with higher boiling points are considered as semi-volatile or non-volatile organic compounds.
[مصدر: ايزو 4618:2014, 2.271, معدل – مذكرة الدخول 2 وأضاف.]
3.5 Semi-volatile organic compound content
SVOC content
ايزو 11890-2-2020 “الدهانات والورنيشات – Determination of volatile organic compounds (VOC) content – جزء 2- Gas chromatography”
Svock
The quality of semi-volatile organic compounds (3.2) present in the coating material as determined under the specified conditions
ملحوظة 1: The nature and number of compounds to be considered will depend on the application area of the coating material. For each application area, limit values as well as determination or calculation methods are specified by regulation or agreement.
ملحوظة 2: If the term SVOC refers to compounds with specified maximum and minimum boiling points, compounds considered as part of the SVOC content are those with boiling points below and including upper and lower limits, and those with higher boiling points are considered as non-volatile organic compounds.
3.6 Exempted Compounds
Organic compounds that do not participate in atmospheric photochemical reactions
ملحوظة 1: This expression is only relevant in certain countries/regions.
ايزو 11890-2-2020 “الدهانات والورنيشات – Determination of volatile organic compounds (VOC) content – جزء 2- Gas chromatography”
3.7 Readily Available
The state of the product, when the product is mixed in the correct proportions in accordance with the manufacturer’s instructions and diluted with the correct diluent as required in order to be ready for use by the approved method
3.8 Internal standard
Compounds not present in the sample, completely separated from the other components in the chromatogram, inert relative to the sample composition, stable over the desired temperature range and known purity, are added to the sample to control the dilution and injection steps of the analysis
3.9 Surrogacy standards
Compounds of known purity, used to quantify unidentified volatile organic compounds and SVOC
3.10 Labeled compounds
Compounds used to distinguish VOC from SVOC, or SVOC from NVOC (if required to be distinguished based on retention time) (3.11)
3.11 Retention time
tR
The time elapsed between the injection of sample components and the recording of peak maxima
3.12 Extraction solvent
Liquid used to extract volatile organic compounds and Svocs from the substrates under study
3.13 Main peak
A peak that makes a significant contribution to either side
– Volatile organic compound content, i.e. ≥ 10% of the absolute volatile organic compound content (على سبيل المثال. DEA equivalent) and ≥0.1% (على سبيل المثال. DEA equivalent), أو
— SVOC content, إنه, ≥10% (DEA equivalent) and ≥0.1% mass (DEA equivalent) of absolute SVOC content
ايزو 11890-2-2020 “الدهانات والورنيشات – Determination of volatile organic compounds (VOC) content – جزء 2- Gas chromatography”
3.14 Secondary peak
Peak, with only a small contribution to either side
– Volatile organic compound content, i.e. &لتر; 0.1% of mass (such as DEA equivalent) and/or &لتر; 10% of the absolute volatile organic compound content (such as DEA equivalent), أو
– SVOC content, namely &لتر; 0.1% by mass (DEA equivalent) and/or absolute SVOC content &لتر; 10% (DEA equivalent)
3.15 الكواشف
Substances used for chemical/biochemical analysis or other reactions
[مصدر: ايزو 20391-1:2018, 3.19]
فقط مكون المعلومات القياسي متاح للعامة. لرؤية المحتوى كاملا, ستحتاج إلى شراء المعايير من خلال القنوات الرسمية.