我国壬基酚的生产与发展

介绍了我国壬基酚生产的工艺技术和装置及新进展 ,指出我国壬基酚的生产水平有了明显的提高 ,能够提供颜色浅且稳定的产品 ,并对今后的发展提出了看法和建议     

壬基酚聚氧乙烯（7）醚磷酸酯的合成研究及单,双酯含量的测定

本文合成了壬基酚聚氧乙烯（７）醚磷酸酯（ＮＥＰ－７），研究了合成条件对单、双酯含量的影响，并介绍了一种测量单、双酯含量的新方法。     

壬基酚甲醛低聚物的组成分析

以壬基酚和甲醛为原料,在十二烷基苯磺酸催化下制备得到壬基酚甲醛低聚物。采用高效液相色谱-质谱联用技术,对壬基酚甲醛低聚物进行了组成分析。结果表明,壬基酚甲醛低聚物中含有游离壬基酚、十二烷基苯磺酸、二聚体、三聚体、四聚体、五聚体、六聚体及七聚体。该方法简捷可行,可对壬基酚甲醛低聚物的质量性能进行有效监控。     

同位素稀释液相色谱－串联质谱法测定食品中的5种环境类雌激素

目的利用在线捕集消除本底,同位素稀释技术,建立婴儿配方食品、鸡蛋、畜肉、水产品、罐头及植物油等食品中4-壬基酚、4-正壬基酚、4-辛基酚、4-正辛基酚和双酚A的超高效液相色谱-串联质谱(ultra-performance liquid chromatography-tandem mass spectrometry, UPLC-MS/MS)测定方法。方法样品经乙腈超声提取,官能化聚苯乙烯/二乙烯苯固相萃取柱(polarenhanced polymer,PEP)净化,超高效液相色谱-串联质谱进行测定,采用电喷雾电离负离子模式(electronicsprayion,ESI-),多反应监测(multiplereaction monitoring,MRM)内标法定量分析。并对5种待测组分测定中存在的本底及消除方法进行了研究。结果 5种环境类雌激素在浓度为0.5～50μg/L范围时线性关系良好,相关系数(r)0.999,方法的定量限为0.5μg/kg,在3种加标浓度的平均回收率为80.1%～104.8%,相对标准偏差(relativestandarddeviation,RSD)小于20%。结论该方法在样品处理过程中采用高温烘烤过的玻璃器皿,并利用在线捕集技术等降低本底,且灵敏度高、定性定量准确,适用于婴儿配方食品、畜肉、水产品、罐头及植物油等中5种环境类雌激素的检测。     

水基切削液中壬基酚聚氧乙烯醚磷酸酯缓蚀性能的电化学方法测定

采用电化学方法测定水基切削液用缓蚀剂的缓蚀性能。以壬基酚聚氧乙烯醚磷酸酯缓蚀剂为例,测定6061铝合金在壬基酚聚氧乙烯醚磷酸酯溶液中的电化学交流阻抗和极化曲线,评价其缓蚀性能。结果表明,电化学方法测定结果与缓蚀剂常用的液相全浸腐蚀试验法的结果完全一致,证明采用电化学交流阻抗和极化曲线评定水基切削液中缓蚀剂的缓蚀性能是可行的。壬基酚聚氧乙烯醚磷酸酯是一种混合型缓蚀剂,可同时抑制阴极和阳极反应,在一定范围内,其添加量越大,缓蚀性能越好。     

Migration of plasticizersphthalates,bisphenol A and alkylphenols from plastic containers and evaluation of risk

This study investigates the potential migration of plasticisers, plastic components and additives from several plastic water bottles. Compounds studied were phthalates (dimethyl phthalate, di-n-butyl phthalate, benzylbutyl phthalate, bis(2-ethylhexyl) phthalate), bis(2-ethylhexyl) adipate, octylphenol, 4-nonylphenol and bisphenol A. Polycarbonate (PC), high-density polyethylene (HDPE), low-density polyethylene (LDPE), polyethylene terephthalate (PET) and polystyrene (PS) plastics used in the water bottling sector were tested using three kinds of total or specific migration tests: (1) standard method UNE-EN ISO 177; (2) ultrasonic forced extraction; and (3) standard method UNE-EN 13130 UNE-EN 13130. 2005. Materials and articles in contact with foodstuffs – plastics substances subject to limitation. Part 1: guide to test methods for the specific migration of substances from plastics to foods and food stimulants and the determination of substances in plastics and the selection of conditions of exposure to food simulants.  [Google Scholar]-1. In addition, bottled waters contained in different plastic materials were analysed to determine the potential migration of target compounds in real conditions. In all cases, samples were solid-phase extracted using Oasis HLB 200?mg cartridges and analysed using GC-MS in scan-acquisition mode. Bisphenol A and 4-nonylphenol were detected in incubated samples, indicating that migration from food plastics can occur at the experimental conditions tested. The total daily intake was calculated according to the levels detected in bottled water and the assessment of the consumers’ risk was evaluated taking into consideration toxicological and legislative values.     

Enzyme-based detergent formulas for fatty soils and hard surfaces in a continuous-flow device

The present work analyzes the effect of incorporating a lipolytic enzyme (Lipolase^® 100L) into detergent formulas for washing fatty soils on hard surfaces. The experimental device, which is called a “bath-substrate-flow” device, uses a continuous flow on a substrate (glass spheres) soiled with triolein. Washing tests were done using only the enzyme and changing both its concentration and the temperature of the process. The results showed that, in the presence of lipase, soil removal was achieved through three consecutive mechanisms: (i) fundamental devoval of the soil by the bath flow through the experimental device; (ii) emulsion of the soil in the washing medium; and (iii) enzymatic hydrolysis of the dispersed soil. Different commercial surfactants were used, and detergency was evaluated in the absence and presence of lipase. The use of surfactant formulas with the lipolytic enzyme showed a positive effect of the enzyme on the detergency values registered with the fatty alcohol ethoxylate surfactants Findet^® 10/15 and Findet 1214N/23, and with the anionic surfactant linear alkylbenzene sulfonate. The commercial surfactants Glucopon^® 600, Glucopon 650, Findet 10/18, and Findet Q/21.5NF alone each presented high detergency values for fatty soils, and the effect of the incorporation of the lipase was not significant.