This standard specifies the analysis method of the sanitary index of polyamide epoxy resin coatings composed of epoxy resin amide curing agent. This standard is applicable to the analysis of sanitary index of polyamide epoxy resin coatings used for corrosion protection on the inner wall of storage tanks, tank cars, etc. that are in contact with wine, soy sauce, fermented food, pickled food and edible oil. GB/T 5009.70-2003 Analysis method of sanitary standard of polyamide epoxy resin coatings on the inner wall of food containers GB/T5009.70-2003 standard download decompression password: www.bzxz.net

ICS67.040
National Standard of the People's Republic of China
GB/T5009.70—2003
Replaces GB/T5009.70-1996
Method for analysis of hygienic standard ofepoxy coating for inner wall of food container
Promulgated on 2003-08-11
Ministry of Health of the People's Republic of China
Standardization Administration of the People's Republic of China
Implementation on 2004-01-01
GB/T5009.70—2003
This standard replaces GB/T5009.70—1996 "Method for analysis of hygienic standard ofpolyamideepoxy coating for inner wall of food container". Compared with GB/T5009.70-1996, this standard has been modified as follows: The structure of the original standard has been modified according to GB/T20001.4-2001 "Standard Writing Rules Part 4: Chemical Analysis Methods". bzxz.net
This standard is proposed and managed by the Ministry of Health of the People's Republic of China. This standard was drafted by Harbin Medical University, Shanghai Coatings Research Institute, and Harbin Municipal Health and Epidemic Prevention Station. This standard was first issued in 1985, revised for the first time in 1996, and this is the second revision. 526
1 Scope
Analysis method of hygienic standard of polyamide epoxy resin coating on the inner wall of food containers
GB/T5009.70-2003
This standard specifies the analysis method of hygienic indicators of polyamide epoxy resin coating composed of epoxy resin polyamide curing agent. This standard applies to the analysis of the hygienic indicators of polyamide epoxy resin coatings used for corrosion protection on the inner walls of storage tanks and vehicles that are in contact with wine, soy sauce, fermented food, pickled food and edible oil. 2 Normative references
The clauses in the following documents become the clauses of this standard through reference in this standard. For all dated references, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, the parties who reach an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For all undated references, the latest versions apply to this standard. GB/T5009.60-2003 Analysis method for hygienic standards of polyethylene, polystyrene and polypropylene molded products for food packaging GB9686 Hygienic standards for polyamide epoxy resin coatings on the inner walls of food containers 3 Sensory inspection (including the use of containers and the preparation of samples, etc.) 3.1 After the coating is cured and formed into a film, the surface is smooth, uniform and free of pores. 3.2 The coating film does not crack, bubble or fall off after immersion. 3.3 The dark coating liquid is a colorless, odorless, tasteless, and precipitate-free transparent liquid, which shall comply with the provisions of GB9686. 4 Sampling method
4.1 Use a 100mm×50mm aluminum plate (thickness 0.5mm~1mm) or a glass plate (thickness about 2mm) as the substrate, and paint the sample plate according to the actual construction process for immersion test (the coating area can be calculated separately for single-sided or double-sided coating). 4.2 Immersion conditions
4.2.1 Sample 1cm is calculated as 2mL immersion liquid. 4.2.2 Distilled water: 60℃, 2h.
4.2.3 Acetic acid (4%). 60℃, 2h.
4.2.4 Ethanol (65%): 60℃, 2h
4.2.5 n-hexane: room temperature, 2h.
5 Evaporation residue
According to Chapter 5 of GB/T5009.60-2003. 6 Potassium permanganate consumption
According to Chapter 4 of GB/T5009.60-2003. 7 Heavy metals (measured in Pb)
According to Chapter 6 of GB/T5009.60-2003. 527
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