GB/T 19941.3-2019 Translated English of Chinese Standard. (GBT 19941.3-2019, GB/T19941.3-2019, GBT19941.3-2019): Leather and fur - Determination of formaldehyde content - Part 3: Formaldehyde emissions [Buy--download True-PDF in 3-second: https://play.google.com/books > Sign in > This BOOK > "3-dots" > Export > Save as "*.pdf"]https://www.chinesestandard.net, 2021. 1. 10. - 15페이지 This Part of GB/T 19941 specifies high performance liquid chromatography (HPLC) method for the determination of formaldehyde emission in leather and fur. This Part is applicable to determination of formaldehyde emission in various leathers, furs and their products. |
자주 나오는 단어 및 구문
0.5mL of 2,4-Dinitrophenylhydrazine 100mL of distilled 10mL volumetric flask 4.0mL of acetonitrile 4684 see Clause 5.0mL of formaldehyde according to actual acetonitrile 4.3 actual situation adopted the international Annex chapter numbers China Chinese standards chromatographic conditions Compared with ISO Deionized water Deleted Determination of formaldehyde distilled water easy to operate Erlenmeyer flask filter membrane 5.10 formaldehyde content Formaldehyde emissions formaldehyde standard solution formaldehyde standard stock fur samples GB/T High performance liquid HPLC international standard Leather and fur mass concentration mechanical and fastness meet the requirements method modified and adopted Modify according Normative references Peak area perform chromatographic determination performance liquid chromatography Physical and mechanical Pipettes Place for 60min~180min recrystallization replace ISO 2419 replace ISO 4684 requirements of QB/T sample bottle Sample preparation sampled in accordance Sodium hydroxide specified standard stock solution standard to replace standard working curve Table A.1 technical differences Test report test result Ultraviolet water to dilute