亚洲精品国产精品发布会_无码中文字幕A级毛片_8x成年视频在线观看_亚洲AV无码日韩AⅤ无码忘忧草_王色a片可以看播放_午夜福利极品视频_美女被啪啪激烈爽到喷水_色婷五月综激情亚洲综合_真实国产老熟女粗口对白_最好看最新中文字幕2019

【Scope of application】

A new formaldehyde quantitative measuring instrument developed in accordance with the national standard method. It is widely used in the rapid quantitative determination of formaldehyde in textiles.

【Related standards】

GB/T2912.1 GB18401

【Basic technical specifications】

1. The lower limit of determination: 5.00mg/kg

2. Measuring range: 0.00-500.00mg/kg (a sample diluted 10 times can reach 5000 mg/kg)

3. Measurement accuracy: ≤ 5%

4. Measurement method: Using the national standard acetylacetone method, formaldehyde reacts with acetylacetone (in the presence of acetic acid-ammonium acetate buffer solution) to produce yellow compounds. To

5. Light source: ultra-bright light-emitting diode, wavelength 412nm