查询词典 formaldehyde

This apparatus can be used to determine the formaldehyde, Sodium formaldehyde sulfoxylate , nitrite ,nitrate ,sulfur dioxide and pesticide residue in food rapidly and quantitatively by spectrophotometry..

仪器采用分光光度法，快速定量检测食品中甲醛、吊白块、亚硝酸盐、硝酸盐、二氧化硫和农药残留，适用于食品生产企业、农业生产基地、农业市场、质量监督、卫生防疫等部门。

SbWE was firstly used as a rapid on-site pretreatment method for food safety. The formaldehyde, sodium formaldehyde sulfoxylate and pesticide residue of methamidophos in food samples were extracted efficiently.

对食品中甲醛、吊白块以及农药残留的亚临界水萃取方法的研究结果表明，该技术具有简便、快速、高效及绿色的优点。

This apparatus can be used to determine the formaldehyde , Sodium formaldehyde sulfoxylate , nitrite ,nitrate ,sulfur dioxide and pesticide residue in food rapidly and quantitatively with spectrophotometer..It is suitable for food production enterprises , agriculture markets ,quality monitoring ,epidemic prevention department ,etc.

项目简介：仪器采用分光光度法，快速定量检测食品中甲醛，吊白块，亚硝酸盐，硝酸盐，二氧化硫和农药残留，适用于各级工商部门，农检中心，农业植保，食品生产企业，农贸批发市场，质量监督，卫生防疫等部门。

The department has begun to "De-tat Longkou fans" sampling. Longkou fans for the incident was found formaldehyde sulfoxylate experts,"formaldehyde sulfoxylate" is a toxic industrial bleaching agent, there are serious side effects to the human body.

昨天，北京市食品安全办通报说，烟台德胜达龙口粉丝有限公司生产的龙口粉丝中被检出&甲醛次硫酸氢钠&，昨天下午，记者紧急联系事发地的山东省招远市质量技术监督局，该部门已经开始对&德胜达龙口粉丝&进行抽检。

Automatic screening algorithm of abnormal data for linear regression calculation, improved algorithm for kinetic analysis and temperature calibration algorithm for enzyme analysis were successfully used in the portable spectrometer. 4. More than ten kinds of chemical reagent kits for rapid determination of environment monitoring and food safety coupled with the portable spectrometer were studied, such as Cr, Pb, Cd, NO2-,,NO3-, formaldehyde, sodium formaldehyde sulfoxylate, COD, NH4+, PO43+, CN-, F, Cl2, etc.

本文研究了六价铬、铅、镉、亚硝酸盐、硝酸盐、甲醛、吊白块、COD、氨氮、磷酸盐、氰化物、氟化物、余氯与总氯等十余种与环境监测和食品安全检测有关的快速检测试剂盒，并与目前实验室标准分析方法进行了分析化学特性的对比研究。

Adhesive has environmentally-friendly products are mainly urea-formaldehyde resin, melamine urea-formaldehyde resin and modified phenolic resin; concrete water reducer products are mainly water-reducing agent has Sulphamate, polycarboxylate water reducer and superplasticizer melamine.

胶粘剂产品主要有环保型脲醛树脂、三聚氰胺改性脲醛树脂和酚醛树脂；混凝土减水剂产品主要有氨基磺酸盐减水剂、聚羧酸减水剂和三聚氰胺减水剂。

This paper presents the influences of sulphonated naphthalene formaldehyde condensatesand sulphonated melamine formaldehyde condensatesused spearately,and compounded sperplassticiseron the slump flow loss for cement paste or mortar.and slump loss for high fluidity concrete.

本文详细研究了单独使用萘系高效减水剂FDN和三聚氰胺树脂系高效减水剂SM ，以及复合使用FDN +SM对水泥净浆和水泥胶砂扩展度，以及大流动性混凝土坍落度经时损失的影响。

The adsorption behaviour of chemically different superplasticizers, such as melamine formaldehyde sulphite polycondensate,β-naphthalene sulfonate formaldehyde polycondensate and polycarboxylate, on early hydrating cement phases was studied. For this purpose, pure ettringite AF(subscript t, monosulfate AF(subscript m and syngenite were prepared. The adsorbed amount and zeta potential of early hydration products were measured.

制备了钙矾石AF(下标 t、单硫型硫铝酸钙AF(下标 m和钾长石类单矿物，并研究了三聚氰胺磺酸盐甲醛缩聚物、β-萘磺酸盐甲醛缩合物及聚发酸盐等几种化学成分不同的超塑化剂在其早期水化颗粒表面上的吸附行为。

In application of modified phenol-formaldehyde resin in OCC pulp, firstly the application effictiveness of phenol-formaldehyde resin modified by triethylamine and diethylene triamine in OCC pulp was researched, and the optimum application effictiveness was gotten through mon- factor trial.

通过对改性酚醛树脂在OCC废纸浆中的应用研究，考察了二乙烯三胺和三乙胺改性酚醛树脂在OCC废纸浆中的应用效果，并通过单因素实验得到了改性酚醛树脂的最佳应用效果。

It has shown that the optimum condition to modify phenol-formaldehyde resin were phenol﹕formaldehyde﹕diethylene triamine 1﹕0.8﹕0.015, reaction temperature 95～105℃and reaction time 2h, when using diethylene triamine as modifying agent.

实验结果表明，以二乙烯三胺为改性剂时，制备改性酚醛树脂的最佳实验条件是：苯酚﹕甲醛﹕二乙烯三胺为1﹕0.8﹕0.015；反应的最高温度为95～105℃；反应时间2h。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。