GB/T 32606-2016 English PDFUS$159.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 32606-2016: Determination method of free formaldehyde in stationery goods -- Spectrophotometry with acetylacetone Status: Valid
Basic dataStandard ID: GB/T 32606-2016 (GB/T32606-2016)Description (Translated English): Determination method of free formaldehyde in stationery goods -- Spectrophotometry with acetylacetone Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: Y50 Classification of International Standard: 71.040.99 Word Count Estimation: 8,838 Date of Issue: 2016-04-25 Date of Implementation: 2016-11-01 Regulation (derived from): National Standard Announcement No Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China GB/T 32606-2016: Determination method of free formaldehyde in stationery goods -- Spectrophotometry with acetylacetone---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order. Determination method of free formaldehyde in stationery goods - Spectrophotometry with acetylacetone ICS 71.040.99 Y50 National Standards of People's Republic of China Determination of free formaldehyde in stationery Acetylacetone spectrophotometric method 2016-04-25 released 2016-11-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Management Committee released ForewordThis standard is drafted in accordance with the rules given in GB/T 1.1-2009. This standard is proposed by the China Light Industry Federation. This standard is nationalized by the National Standardization Technical Committee of Stationery (SAC/TC514). The drafting of the standard units. Shanghai Culture and Education Institute of Sporting Goods Co., Ltd., the National Light Industry Stationery Quality Supervision and Testing Center, Shenzhen City, measured Technology Co., Ltd., the State Cultural and Educational Supplies Quality Supervision and Inspection Center, Effective Group Co., Ltd., Shenzhen City, Qi stationery Co., Ltd., Guangdong Lianzhong Stationery Co., Ltd., Ningbo Songhe Stationery Co., Ltd., Guangbo Group Co., Ltd., true color stationery shares Co., Ltd., Hebei Qingzhu Art Pigment Co., Ltd. The main drafters of this standard. Liu Haiwei, Wang Yuren. Determination of free formaldehyde in stationery Acetylacetone spectrophotometric method1 ScopeThis standard specifies the use of spectrophotometric determination of stationery (including adhesives, bags of fabrics and accessories, such as color mud, etc.) in the free Method for hydrolyzing formaldehyde content. This standard applies to the formaldehyde content of more than 50mg/kg stationery test.2 normative reference documentsThe following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article Pieces. For undated references, the latest edition (including all modifications) applies to this document. Preparation of standard titration solution for GB/T 601 chemical reagents GB/T 6682 Analytical laboratory water specifications and test methods3 principleIn the pH = 6 acetic acid - ammonium acetate buffer solution, formaldehyde and acetylacetone in the boiling water bath conditions to quickly generate a stable yellow And the absorbance was measured at 415 nm after cooling. According to the standard curve, the free hydrolyzed formaldehyde content in the sample was calculated.4 reagent4.1 Unless otherwise stated, the reagents used are of analytical grade. Test water should meet the GB/T 6682 in the provisions of the three water. 4.2 acetylacetone solution (0.25%, volume fraction). Weigh 25g ammonium acetate, add a small amount of water to dissolve, add 3mL glacial acetic acid and 0.25mL Acetylacetone, mix and then add water to 100mL, adjust the pH to 6.0. This solution is stored at 2 ℃ ~ 5 ℃, can be stable for 1 month. 4.3 hydrochloric acid solution. 1 5 (volume ratio). 4.4 Sodium hydroxide solution. 30 g/100 mL. 4.5 iodine standard solution (0.1mol/L). according to GB/T 601 for preparation. 4.6 Sodium thiosulfate solution (0.1mol/L). Prepared according to GB/T 601. 4.7 starch solution (1g/100mL). said 1g starch, with a small amount of water into a paste into 100mL boiling water, was a transparent solution, temporary use Preparation. 4.8 Formaldehyde. mass fraction of 36% to 38%. 4.8.1 formaldehyde standard stock solution. take 10mL formaldehyde solution (4.8) placed in 500mL brown volumetric flask, diluted with water to the mark, mix. Formaldehyde standard stock solution at 4 ℃ under the conditions of preservation, preservation period of 6 weeks. 4.8.2 formaldehyde standard stock solution calibration. draw 5.0mL formaldehyde standard stock solution (4.8.1) placed in 250mL iodine bottle, iodized standard Solution (4.5) 30.0 mL, immediately add dropwise sodium hydroxide (4.4) until the color faded to light yellow (about 0.7 mL), allowed to stand for 10 min, 15 mL of hydrochloric acid solution (4.3) was added, left in the dark for 10 min, 100 mL of freshly boiled water was added, and the purified thiosulfide Sodium hydroxide solution (4.6) titrated to light yellow, add the newly prepared starch solution (4.7) 1mL, continue to titrate until the blue has just disappeared to the end, the same When the blank test. According to formula (1) calculation of formaldehyde standard stock solution concentration ρ formaldehyde. ...... |
