This standard is one of a series of standards dealing with the sampling and testing of paints, varnishes and related products.
This standard specifies a method for the determination of the volatile organic compound (VOC) content of paints, varnishes and their raw materials. This part is preferred if the expected VOC content is greater than 0.1% by mass and less than about 15% by mass. When the VOC content is greater than about 15% by mass, the less complicated method given in GB/T 23985 may be used.
This method assumes that the volatile matter is either water or organic. However, other volatile inorganic compounds can be present and might need to be quantified by another suitable method and allowed for in the calculations.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments to (excluding amending errors in the text), or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of the normative document is applicable. For undated references, the latest edition of the normative document applies.
GB/T 3186 Paints, Varnishes and Raw Materials for Paints and Varnishes - Sampling (GB/T 3186-2006, ISO 15528:2000, IDT)
GB/T 6283 Chemical Products - Determination of Water - Karl·Fischer Method (General Method) [GB/T 6283-1986, eqv ISO 760:1978, Determination of Water - Karl Fisher Method(General method)]
GB/T 6750 Paints and Varnishes - Determination of Density - Pyknometer Method (GB/T 6750-2007, ISO 2811-1:1997, Paints and Varnishes - Determination of Density - Part 1:Pyknometer Method, IDT)
GB/T 20777 Paints and Varnishes - Examination and Preparation of Samples for Testing (GB/T 20777-2006, ISO 1513:1992, IDT)
GB/T 21862.2 Paints and Varnishes - Determination of Density - Part 2: Immersed Body (Plummet) Method (GB/T 21862.2-2008, ISO 2811-2:1997, IDT)
GB/T 21862.3 Paints and Varnishes - Determination of Density - Part 3: Oscillation Method (GB/T 21862.3-2008, ISO 2811-3:1997, IDT)
GB/T 21862.4 Paints and Varnishes - Determination of Density - Part 4: Pressure Cup Method (GB/T 21862.4-2008, ISO 2811-4:1997, IDT)
3 Terms and Definitions
For the purposes of this standard, the following terms and definitions apply.
3.1 Volatile organic compound (VOC)
Any organic liquid and/or solid that evaporates spontaneously at the prevailing temperature and pressure of the atmosphere with which it is in contact
