GB 31604.33-2016 Translated English of Chinese Standard. GB31604.33-2016: National food safety standard - Food contact materials and products Determination of nickel migrationhttps://www.chinesestandard.net, 23. apr. 2018 - 12 sider This standard specifies determination method of caprolactam and migration quantity in food contact aterials and products. This standard applies to determination of caprolactam and migration quantity in food contact materials and products. |
Innhold
| 3 | |
Scope | 4 |
Instruments and equipment | 6 |
Expression of analysis results | 7 |
Reagents and materials | 8 |
Instruments and equipment | 10 |
Expression of analysis results | 11 |
Annex A Reference temperature rise program of graphite furnace atomic absorption spectrometer | 12 |
Vanlige uttrykk og setninger
100-mL volumetric flask 60-mL separatory funnel acid solution 0.5 ADD 10 mL ADD 2 mL ammonia solution 0.3 ammonium dihydrogen phosphate amount of nitric Analytical balance aqueous layer arithmetic mean basic dimethylglyoxime solution bromine water chloroform layer country and awarded coupled plasma atomic Determination of nickel diammonium hydrogen nitrite DILUTE with water dimethylglyoxime ethanol solution food contact materials g of dimethylglyoxime hydrochloric acid solution hydrogen nitrite solution Inductively coupled plasma LET STAND materials and products mg/L mL of ammonia mL of chloroform mL of hydrochloric mL of nickel mL of nitric mL of water nickel migration Nickel standard solution nickel standard stock nitric acid solution nitrite solution 100 plasma atomic emission Reagents SEPARATE the chloroform series to quantify soaking solution sodium hydroxide solution solution 0.5 mol/L solution 10 g/L solution 1000 mg/L specifications of GB Spectrophotometric standard curve standard series standard stock solution standard substance certificate vigorously SHAKE water to 100