宽温低泡除油剂DTP-2的应用研究

研究了宽温除油剂DTP-2对涤纶织物油污的去除效果,分析了除油剂用量、碳酸钠用量、除油温度对除油效果的影响。结果表明:当除油剂DTP-2用量为1.5 g/L、碳酸钠用量为1.5 g/L、除油温度为60~100℃时,宽温除油剂DTP-2的除油效果理想。与市场上同类产品相比较,除油剂DTP-2适用温度范围广,是一种高效的宽温除油产品。     

高效除油剂HS-1O1D的应用研究

探讨了纯碱用量、除油剂用量、除油温度对除油剂除油效果的影响,试验表明:当除油剂HS-101D用量2 g/L,纯碱1.5g/L,100℃左右处理涤纶油污织物(或90℃处理氨纶丝),可以达到较好的除油效果.另外,与市场上同类产品的对比试验结果显示,除油剂HS-101D的除油效果相对较好.     

纺织品用除油剂WXP-200的研制及应用

为了解决市场上现用除油剂含磷、泡沫较多和原料含有难以生物降解的化学成分等问题,以生物降解性好、无磷表面活性剂及添加剂为原料,研发出一种低泡无磷除油剂WXP-200,配方:JLD-0550.4％、JLD-0621.6％、JLD-0218.0％、JL-120010.0％.探究氢氧化钠用量、处理温度、处理时间对除油剂除油效果...     

涤纶练染同浴除油剂RH-NB-1107A

介绍了涤纶练染同浴除油剂RH-NB-1107A的基本性能。与市场同类产品进行比较发现,RH-NB-1107A具有优异的乳化性、低泡性、高温分散性和缸体防沾污性,适用于涤纶除油染色同浴工艺,去油效果显著,可缩短工序、提高效率、节省能源。     

除油剂TF-115D除油染色一浴工艺的生产应用

化纤织物织造过程中需要用到大量油剂,在染整加工时会影响染色性能,如色疵、色花、染色不匀等问题,因此,化纤织物的前处理除油尤为重要。文中首先筛选除油剂,并将其应用到涤氨、锦氨针织物的前处理除油,并进行平幅水洗除油和除油染色一浴工艺实践。结果表明,除油剂TF-115D具有较好的去油效果,可用于化纤织物的前处理除油;对于锦氨和涤氨油污针织物,当除油剂TF-115D为2.0 g/L,纯碱1.5 g/L,80℃处理20 min时,可以获得较好的除油效果,平幅水洗除油生产实践效果较好。除油染色一浴工艺中,除油剂TF-115D用量为2.0 g/L时,具有理想的除油效果,对染色织物的得色量和色光影响极小,实现均匀染色的同时可以有效节省时间,节约用水、用电和蒸汽能源,降低加工成本。     

除油剂XP

将除油剂XP应用到涤棉混纺织物常规皂洗工艺中,探讨了除油剂用量对涤棉混纺织物除油效果和皂洗效果的影响。试验结果显示,除油剂XP质量浓度为2～3 g/L,皂洗剂HS 2 g/L,织物的除油效果最好。除油剂XP不影响皂洗效果,处理织物色牢度好。     

低泡弹性织物除油剂M-1151C在精练除油中的应用北大核心

以十二烷基聚氧乙烯聚氧丙烯醚(LEPO)为主要组分,复配了低泡弹性织物除油剂M-1151C。研究了LEPO用量对复配体系泡沫性能的影响,并将除油剂M-1151C用于涤纶针织布与涤锦针织布。结果表明,当M-1151C质量浓度为1 g/L,130℃处理30 min,织物除油效果和对分散染料的分散效果较优。用于涤纶除油染色同浴工艺时,可缩短工艺流程。     

除油剂FW

涤纶及棉织物在染色前需进行除油前处理,探讨了除油剂FW质量浓度、纯碱质量浓度、处理温度对除油剂除油效果的影响。试验表明:当除油剂FW 2g/L,纯碱1.5 g/L,100℃处理30 min油污织物,可以达到较好的除油效果;除油剂FW与染色同浴使用时,对织物的色差影响较小。     

多功能除油剂DM-1112在针织物上的应用工艺探讨

介绍了多功能除油剂DM-1112的结构特征和应用范围,探讨了其在除油工艺、涤纶针织物除油染色同浴工艺、纯棉针织物精练工艺的应用效果,并分析了各工艺影响因素,得出DM-1112的最佳除油效果用量为1.0 g/L,60 ℃和100 ℃均可,但100 ℃除油效果更佳,且在酸性、碱性环境下都具有理想的除油效果.     

锦/氨织物用无磷除油剂

通过乳化剂复配的方法制备了一系列不同HLB值的无磷除油剂,并对锦/氨织物进行除油处理。探讨了除油剂组分、处理工艺条件等对除油效果的影响。研究表明,乳化剂TO-5与FMEE复配质量比为m(TO-5)∶m(FMEE)=1∶2时,其除油率高于TO-5与其他乳化剂复配的除油剂。TO-5与FMEE复配除油剂的最佳处理工艺为:温度70℃、时间30 min、质量浓度2 g/L,整理后织物的除油率可达80.4%。复配除油剂与抗热黄变剂在同浴处理时具有很好的相容性,处理后织物的除油率和白度都略高于市售除油剂处理的。     

Reliable identification of grapevine rootstock varieties using RAPD PCR on woody samples

Since grapevine ( Vitis spp .) rootstock material is being traded increasingly as disbudded woody material a lack of distinctive morphological features on such material necessitates an alternative and reliable means of identification. Methods described here were developed for rapid and efficient extraction of DNA from woody samples rich in phenolic compounds and polysaccharides, and for subsequent identification of varieties by RAPD PCR. Using these methods, and with the application of only one selected RAPD primer, we were able to differentiate sixteen rootstock varieties, including the seven varieties most commonly used in Germany. Problems commonly encountered with reproducibility of RAPD patterns were avoided by choosing primers with a dinucleotide sequence and a high G/C content that allowed a rather high annealing temperature of 45°C. Methods described here should also be useful for other horticultural crops, especially those with woody tissues rich in phenolic compounds and polysaccharides.     

An internet compendium of analytical methods and spectroscopic information for monomers and additives used in food packaging plastics

An internet website (http://cpf.jrc.it/smt/) has been produced as a means of dissemination of methods of analysis and supporting spectroscopic information on monomers and additives used for food contact materials (principally packaging). The site which is aimed primarily at assisting food control laboratories in the European Union contains analytical information on monomers, starting substances and additives used in the manufacture of plastics materials. A searchable index is provided giving PM and CAS numbers for each of 255 substances. For each substance a data sheet gives regulatory information, chemical structures, physico-chemical information and background information on the use of the substance in particular plastics, and the food packaging applications. For monomers and starting substances (155 compounds) the infra-red and mass spectra are provided, and for additives (100 compounds); additionally proton NMR are available for about 50% of the entries. Where analytical methods have been developed for determining these substances as residual amounts in plastics or as trace amounts in food simulants these methods are also on the website. All information is provided in portable document file (PDF) format which means that high quality copies can be readily printed, using freely available Adobe Acrobat Reader software. The website will in future be maintained and up-dated by the European Commission's Joint Research Centre (JRC) as new substances are authorized for use by the European Commission (DG-ENTR formerly DGIII). Where analytical laboratories (food control or other) require reference substances these can be obtained free-ofcharge from a reference collection housed at the JRC and maintained in conjunction with this website compendium.     

Aroma characterization of various apricot varieties using headspace–solid phase microextraction combined with gas chromatography–mass spectrometry and gas chromatography–olfactometry

The characterization of the aromatic profile of several apricot cultivars with molecular tracers in order to obtain objective data concerning the aromatic quality of this fruit was undertaken using headspace–solid phase microextraction (HS–SPME). Six apricot cultivars were selected according to their organoleptic characteristics: Iranien, Orangered, Goldrich, Hargrand, Rouge du Roussillon and A4025. The aromatic intensity of these varieties measured by HS–SPME–Olfactometry were defined and classified according to the presence and the intensity of grassy, fruity and apricot like notes. In the six varieties, 23 common volatile compounds were identified by HS–SPME–GC–MS. Finally, 10 compounds, ethyl acetate, hexyl acetate, limonene, β-cyclocitral, γ-decalactone, 6-methyl-5-hepten-2-one, linalool, β-ionone, menthone and (E)-hexen-2-al were recognized by HS–SPME–GC–O as responsible of the aromatic notes involved in apricot aroma and considered as molecular tracers of apricot aromatic quality which could be utilized to discriminate apricot varieties.     

Tests of potential functional barriers for laminated multilayer food packages. Part I: Low molecular weight permeants

The advent of the functional barrier concept in food packaging has brought with it a requirement for fast tests of permeation through potential barrier materials. In such tests it would be convenient for both foodstuffs and materials below the functional barrier (sub-barrier materials) to be represented by standard simulants. By means of inverse gas chromatography, liquid paraffin spiked with appropriate permeants was considered as a potential simulant of sub-barrier materials based on polypropylene (PP) or similar polyolefins. Experiments were performed to characterize the kinetics of the permeation of low molecular weight model permeants (octene, toluene and isopropanol) from liquid paraffin, through a surrogate potential functional barrier (25 μm-thick oriented PP) into the food simulants olive oil and 3% (w/v) acetic acid. These permeation results were interpreted in terms of three permeation kinetic models regarding the solubility of a particular model permeant in the post-barrier medium (i.e. the food simulant). The results obtained justify the development and evaluation of liquid sub-barrier simulants that would allow flexible yet rigorous testing of new laminated multilayer packaging materials.     

Chlorohydrins of bisphenol A diglycidyl ether (BADGE) and of bisphenol F diglycidyl ether (BFDGE) in canned foods and ready-to-drink coffees from the Japanese market

BADGE.2HCl and BFDGE.2HCl were determined in 28 samples of ready-to-drink canned coffee and 18 samples of canned vegetables (10 corn, 5 tomatoes and 3 others), all from the Japanese market. HPLC was used as the principal analytical method and GCMS for confirmation of relevant LC fractions. BADGE.2HCl was found to be present in one canned coffee and five samples of corn, BFDGE.2HCl in four samples of canned tomatoes and in one canned corn. No sample was found which exceeded the 1mg/kg limit of the EU for the BADGE chlorohydrins. However the highest concentration was found for the sum of BFDGE.2HCl and BFDGE.HCl.H₂O at a level of 1.5mg/kg. A Beilstein test confirmed that all cans containing foods contaminated with BADGE.2HCl or BFDGE.2HCl had at lest one part coated with a PVC organosol.     

European priorities for research to support legislation in the area of food contact materials and articles

A strong science base is required to underpin the planning and decision-making process involved in determining future European community legislation on materials and articles in contact with food. Significant progress has been made in the past 5 years in European funded work in this area, with many developments contributing to a much better understanding of the migration process, and better and simpler approaches to food control. In this paper this progress is reviewed against previously identified work-areas (identified in 1994) and conclusions are reached about future requirements for R&D to support legislation on food contact materials and articles over the next 5 or so years.     

Analysis of benzo[a]pyrene in spiked fatty foods by second derivative synchronous spectrofluorimetry after microwave-assisted treatment of samples

A simple, rapid and inexpensive method has been developed for the determination of benzo[a     

The development of reference materials for paralytic shellfish poisoning toxins in lyophilized mussel. II: Certification study

This paper describes the second part of a project undertaken to develop certified mussel reference materials for paralytic shellfish poisoning toxins. In the first part two interlaboratory studies were undertaken to investigate the performance of the analytical methodology for several PSP toxins, in particular saxitoxin and decarbamoyl-saxitoxin in lyophilized mussels, and to set criteria for the acceptance of results to be applied during the certification exercise. Fifteen laboratories participated in this certification study and were asked to measure saxitoxin and decarbamoyl-saxitoxin in rehydrated lyophilized mussel material and in a saxitoxin-enriched mussel material. The participants were allowed to use a method of their choice but with an extraction procedure to be strictly followed. The study included extra experiments to verify the detection limits for both saxitoxin and decarbamoyl-saxitoxin. Most participants (13 of 15) were able to meet all the criteria set for the certification study. Results for saxitoxin.2HCl yielded a certified mass fraction of <0.07 mg/kg in the rehydrated lyophilized mussels. Results obtained for decarbamoyl-saxitoxin.2HCl yielded a certified mass fraction of 1.59+/-0.20 mg/kg. The results for saxitoxin.2HCl in enriched blank mussel yielded a certified mass fraction of 0.48 +/- 0.06 mg/kg. These certified reference materials for paralytic shellfish poisoning toxins in lyophilized mussel material are the first available for laboratories to test their method for accuracy and performance.     

Announcing a new international peer-reviewed journal:Food Science and Human Wellness now accepting manuscript submission in English

<正>We are pleased to announce the launch of a new international peer-reviewed journal-Food Science and Human Wellness,ISSN 2213-4530,which is an open access journal,produced and hosted by Elsevier B.V.on behalf of Beijing Academy of Food Sciences.Food Science and Human Wellness is an international peer-reviewed English journal that provides a forum for the dissemination of the