彩乐乐彩票网

彩53彩票网 万人炸金花 新橙彩票 电子游戏 360彩票 中国福彩网 一定牛彩票网 精选四肖三码 白小姐四肖必选一肖四不像 六肖中特精选

手持式合金分析仪 合金分析仪 Hand- held spectrometer

GC-MS

Your current page: 彩乐乐彩票网 > Solutions > GC-MS

GC-MS 6800 tests BHT and BHA in EVA materials

Date: 2019/11/15 9:46:22 Clicks: 1192

二叔丁基-4-甲基苯酚( BHT )是聚丙烯、聚乙烯、聚苯乙烯、 ABS树脂、聚酯、纤维素树脂和泡沫塑料的廉价、通用抗氧化剂,使用于食品级塑料和包装食品用聚合物材料,以及天然橡胶、合成橡胶的白色或浅色制品中。 2,6- Di-tert-butyl- 4 -methylphenol ( BHT ) is a cheap, universal antioxidant for polypropylene, polyethylene, polystyrene, ABS resin, polyester, cellulose resin, and foamed plastics. It is used in food Grade plastics and polymer materials for packaged foods, and white or light-colored products made of natural rubber and synthetic rubber. 有致癌性,能够引发肝脏肥大、出生率低下、染色体异变、催畸形性等病变。 BHT is carcinogenic and can cause liver hypertrophy, low birth rates, chromosomal mutations, and teratogenicity. )是目前常用的酚类抗氧化剂,在有效浓度时没有毒性,有潜在致癌性,两者合用有增效作用。 Butyl hydroxyanisole ( BHA ) is a commonly used phenolic antioxidant, which is non-toxic at effective concentrations and has potential carcinogenicity. The combination of the two has synergistic effects.

)对未知化合物筛选有巨大优势,可广泛应用于材料中有毒有害物质的定性定量分析。 Gas chromatography-mass spectrometry ( GCMS ) has great advantages in screening unknown compounds, and can be widely used for the qualitative and quantitative analysis of toxic and harmful substances in materials. )全扫描模式,可以完成化合物的筛查,采用GCMS-SIM的模式可以做准确的定量分析。 By gas chromatography separation, the electron bombardment ionization source ( EI ) full scan mode can be used to complete the compound screening, and the GCMS-SIM mode can be used for accurate quantitative analysis. 气相色谱质谱联用仪,对BHTBHA进行分析,得到比较满意的测试效果。 GC-MS 6800 gas chromatography-mass spectrometer was used to analyze BHT and BHA, and the results were satisfactory.

 

仪器简介 1.Introduction to the instrument

是天瑞仪器精心打造的一款高性价比气相色谱质谱联用仪,具有完全的自主知识产权,拥有多项专利技术,可广泛应用于高分子材料、环境保护、电子电器、医药、石油化工、食品安全、纺织皮革等行业中有害物质的检测。 GC-MS 6800 is a cost-effective gas chromatograph / mass spectrometer carefully built by Skyray Instrument. , Petrochemical, food safety, textile and leather industries

气相色谱质谱联用仪外观图 Figure 1. GC-MS 6800 GC / MS Appearance

2 . Experimental part

测试原理 2.1 Test Principle

分析。 The samples were accurately weighed after being shredded, ultrasonically extracted with an organic solvent, and the extract was filtered and analyzed by GCMS . Based on the retention time of the target compound and the standard mass spectrum or characteristic ion, it is quantified by external standard method.

主要仪器设备、耗材和试剂 2.2 Main instruments and equipment, consumables and reagents

GC-MS 6800 gas chromatography mass spectrometer with electron bombardment source (Jiangsu Tianrui Instrument Co., Ltd.);

(国家标准物质网); BHT standard: 99% purity (National Standard Substance Network);

(国家标准物质网); BHA standard: 99% purity (National Standard Substance Network);

级(默克集团) N-hexane: HPLC grade (Merck Group)   .

测试条件 2.3 Test conditions

30m × 0.25mm × 0.25 μ m ; Column: DB-5MS , 30m × 0.25mm × 0.25 μm;

℃保持1min25/min升至200 ℃保持5min ; Oven program temperature rising conditions: initial temperature 50 ℃ for 1 min , 25/ min to 200 ℃ for 5 min ;

; Injection method: splitless injection, splitless time 1min ;

μ L ; Injection volume: 1.0 μL ;

℃; Inlet temperature: 250 ℃;

℃; Temperament interface temperature: 250 ℃;

℃; Ion source temperature: 280 ℃;

,流速1.5mL/min ; Carrier gas: Helium, purity ≥ 99.999% , flow rate 1.5mL / min ;

; Ionization mode: EI ;

; Ionization energy: 70eV ;

; Solvent removal time: 6.5min ;

模式定性(扫描范围: 50-350amu ), SIM模式定量。 Measurement method: qualitative in FULL SCAN mode (scanning range: 50-350amu ), quantitative in SIM mode.

 

3 Test Results

两种目标物组分定性结果 3.1 Qualitative results of two target components

BHT 1.BHA 2. BHT

 

两种目标物TIC图 Figure 2. TIC diagram of two targets

质谱图 Figure 3. BHA mass spectrum.

质谱图 Figure 4. BHT spectrum.

 

目标物测试信息 Table 1. Target test information

Compound

English name

CAS number

Characteristic ion

BHA

3-tert-butyl-4-hydroxyanisole

121-00-6

165 * 137 180

BHT

2,6-Di-tert-butyl-4-methylphenol

128-37-0

205 * 145 177 220

3.2 Sample test

线性良好。 The target has good linearity from 0.5ppm to 10ppm . A blank plastic sample was spiked, and the sample was ultrasonically extracted with n-hexane. 加标水平(图5 ),得到比较满意的效果。 10ppm fortified level (Figure 5 ), get a more satisfactory effect.

加标下TIC图 Figure 5. TIC diagram with 10ppm spiking

BHA 2. BHT 1. BHA 2. BHT

 

4. Summary

,在SIM扫描模式下对BHABHT进行测试,方法稳定可靠,线性范围好,灵敏度高,受杂质峰的干扰小,能够对EVA材料中的BHABHT进行有效的定性定量分析。 This experiment uses GC-MS 6800 to test BHA and BHT in SIM scanning mode. The method is stable and reliable, has good linear range, high sensitivity, and is less affected by the interference of impurity peaks. It can effectively perform BHA and BHT in EVA materials. Qualitative and quantitative analysis.

 

参考文献 5. References

2016食品安全国家标准食品中9种抗氧化剂的测定 [1] GB5009322016 National Food Safety Standard Determination of 9 antioxidants

食品容器、包装用塑料原料第3部分:乙烯聚合物和乙烯-醋酸乙烯酯( EVA )共聚物中丁基-羟基甲苯( BHT )的测定气相色谱法 [2] SNT 1504.3-2014 plastic materials for food containers and packaging. Part 3 : Determination of butyl-hydroxytoluene ( BHT ) in ethylene polymers and ethylene - vinyl acetate ( EVA ) copolymers. Gas chromatography

Related Products

  • Gas chromatography mass spectrometry

    Model: GC-MS 6800
    Gas chromatography mass spectrometry

contact us

For more details, call
800-9993-800
400-7102-888
After-hours service hotline
139 1323 1381
Leave us a message
Leave message
WeChat service QR code


手持式合金分析仪 合金分析仪 Hand- held spectrometer