EN71-3：2013玩具可迁移铬价态分析方法确认

采用LC-ICPMS测定EN71-3玩具中的可迁移铬（三价铬＆amp;六价铬）方法,通过确认,本方法完全满足标准中第三类玩具样品的测试要求。     

不锈钢供水管道中铬元素迁移及防控技术

选择国内企业生产的不锈钢供水管道,用余氯和硬度分别为2、100 mg/L的浸泡液浸泡24 h,并检测水质中六价铬的变化。结果显示,浸泡液中的六价铬变化与不锈钢供水管道的工艺有很大关系,焊缝处理、打磨抛光、酸洗钝化三个条件都对六价铬的迁移有很大影响。     

软泥类玩具材料中硼酸和硼酸盐含量检测方法研究

本文研究了软泥类玩具材料中硼酸和硼酸盐含量的检测方法,用0.07 mol/L盐酸溶液提取试样,电感耦合等离子体质谱KED模式分析同位素11B,通过硼元素的含量换算成硼酸和硼酸盐来确定软泥类玩具材料中硼酸和硼酸盐的含量。硼元素浓度在2~1000μg/L与其响应值呈线性关系(R^2=0.99984),硼元素、硼酸、硼酸盐的检出限分别为0.042 mg/kg、0.240mg/kg和0.369 mg/kg,定量限分别为0.100 mg/kg、0.572 mg/kg和0.883 mg/kg,加标回收率为87.5%~105.3%,相对标准偏差(RSD,n=7)小于5%。该方法准确度高、精密度好,满足软泥类玩具材料中硼酸和硼酸盐的测定。     

出口欧鳗中噁喹酸残留痕量检测新技术研究

以出口欧鳗样品为实验材料,探索了只需经样品均化,40%甲醇(含15mmol/L高氯酸和25mmol/L磷酸)提取溶液提取、离心、过滤,高效液相色谱-荧光检测器检测等步骤的噁喹酸残留快速检测方法.试验表明,该方法技术操作步骤少,检测限低,检测效率高,能满足输韩欧鳗产品噁喹酸残留限量低至1μg/kg的超痕量检测监控要求.方法的添加浓度为5μg/kg时,回收率55%～82%,检测限0.5μg/kg.     

电感耦合等离子体质谱法测定水晶泥中可迁移元素硼含量

本文参照EN71-3黏稠性玩具样品处理方法,建立了电感耦合等离子体质谱法(ICP-MS)测定水晶泥玩具材料中硼元素迁移量的检测方法。对该方法的同位素选择、线性范围和检出限、加标回收率和精密度、实际样品测试等进行了讨论。结果表明,该方法的线性范围宽,ICP-MS测定硼元素线性相关系数可达0.9996,该方法加标回收率为90.60%,相对标准偏差在4.40%。建立的ICP-MS法测定水晶泥玩具材料中硼元素具有检出限低、精密度高、简便快速等优点,可用于水晶泥玩具材料中硼元素迁移的定量分析。     

离子色谱-电感耦合等离子体质谱法测定奶粉中六价铬含量

本文建立了离子色谱-电感耦合等离子体质谱(ICP-MS)法测定奶粉中六价铬含量.采用全惰性PEEK材料的离子色谱仪与ICP-MS联用,使用AG7阴离子保护柱快速分离并检测奶粉中的六价铬.方法检出限为0.05 mg/kg,加标回收率为80％～110％,精密度RSD值＜6％.该方法操作简单,灵敏度、准确度和精密度较高,适用...     

HPLC法快速测定果汁饮料中胭脂虫红的含量

建立了不同类型的饮料中胭脂虫红含量测定的高效液相色谱法。HPLC色谱条件:以C_(18)作为分离柱;流动相为乙腈-0.5%H_3PO_4溶液(80:20);流速1.0 mL/min;检测波长275 nm;进样量10μL。本方法胭脂虫红检出限为0.1 mg/kg,回收率为88.9%~98.6%,相对标准偏差为1.87%~3.14%。     

HPLC法测定婴幼儿营养米粉中泛酸的含量

本文建立了利用HPLC法测定婴幼儿米粉中泛酸含量的方法。色谱柱:Kinetex C_(18) 2.6μm,4.6×100 mm;流动相:0.02 mol·L~(-1)磷酸二氢钾溶液∶甲醇=95∶5;流速:1 mL·min~(-1);柱温:35℃;进样量:20μL;二极管矩阵检测器,检测波长200 nm。方法在0.861 2～8.612 1μg·mL~(-1)范围内线性良好,相关系数R~2=0.999 946 6,泛酸加标回收率平均值97.6%,样品测定精密度RSD为2.54%。     

可触及玩具材料特定元素迁移的安全检测

本文阐述了玩具中特定元素迁移的危害、标准限量及国内外安全监管现状．讨论了特定元素迁移的测试方法及结果分析，并对控制玩具材料特定元素迁移提出了对策建议。     

高效液相色谱法测定禽蛋中的三聚氰胺

本实验建立了禽蛋中三聚氰胺的测定方法。采用高效液相色谱仪,乙腈：（0.01mol/L辛烷磺酸钠和0.01mol/L柠檬酸）=10：90作为流动相,C18色谱柱,检测波长为240nm。结果表明：在0.5-100μg/mL浓度范围,线性关系良好,r=0.9995;变异系数为0.6%;试样测定的相对标准偏差（RSD）〈3%。本法操作简便,测定结果准确。     

Brown＇s Blossom in Britain-China

The overall strategic relationship between U.K. and China is ＂better than ever＂, China- Britain relations have maintained good momentum, with increased high-level exchanges and the reinforcement of strategic mutual trust, with more room for growth in the future.     

Challenge and Opportunity Go Hand in Hand——What Global Economic Agitation Brings to the China's Economy?

Domino effects of the global finance agitation As the origin of the subprime crisis,US financial institutions lost USS45 billion last year,accounted for over half of the total US,EU & Japan loss.Since January 15th,Chtigroup released its financial statement of the 4th quarter,showing a net deficit of USS9.83 billion,which marked the hisoric high of its quarterly deficit.     

Sinosteel：Extraordinary Moves in Industry Chess

Among the Fortune 500 firms,more and more images from China emerge out.On the 2008 list,Sinosteel Corporation,a landmark group of China industries quietly squeezes into the candidate line.As the largest steel service ＆ trade enterprise,its sales reached at RMB 111.24 billion,with a year-on-year increase of 83.03 percent,and the profit grew by 180.03 percent.On the Sinosteel 2008 Work Meeting,the president Huang Tianwen uttered,＂In the coming year,we will work for US$20 billion sales,and look forward to getting a position in Fortune 500 firms for ourselves.＂     

Walk Through Unusual Five Years—— An Exhibitor＇s Canton Fair Course

When the 103rd Canton Fair is approaching, an old friend of Canton Fair, Li Ying from Jiangsu prov-ince recollected his past five years＇ experiences to the grand trade meeting. Each year is special, with some unforgettable memories colored by the year.     

Jean-Pierre Duprieu： Willing to Be A Legate of Sino-French Business

Estaing, former French president, Valery Giscard d＇Estaing attended Sino-French Economic Seminar held in Shanghai in early April and said that the world center has shifted from the west to the east with many European and US companies entering into Asia, and China has the ability to play an important role in the world stage. Estaing, naming himself＂French Confucian＂, then said in Chinese that a cook-group includes 10 people in ancient Chinese soldier system and the cook is in charge of cooking for them. And people who belong to the same cook are actually ＂Partners＂.     

China''''s Stock Market Wave

The annual meeting of the World Economy Forum was held in Davos,a little town in Switzerland,on January 23rd to the 27th this year,with the theme"the Power fo Collaborative Innovation",over 2500 celebrates from ture political and cconomic circles of more than 80 countries and challengred logether to talk about the future of the global economy in 2008,A Forum for the problems and challenges that face whole world,some of the keywords which drew attention during the event were:the U.S.subprime mortgage crisis,soaring energy prices,the economic slowdown in the U.S.ermerging economic bodies,authority funds and the general unpredictable nature of the global economy.     

Trade Promotion from Neighborhood

If you are considering to trade with companies in Japan or expanding your .business to Japan, we are ready to help from the very beginning.＂ You will find this greeting at the first sight on the Chinese website of Japan External Trade Organization （JETRO）. JETRO has committed itself in delivering highly efficient and quality services to meet the demand of internal and external customs including Japanese companies, hence winning a good reputation in the international trade arena. In recent years, with its priority in advancing business cooperation in South and East Asia, JETRO has made great achievement in promoting trade between China and Japan. Therefore, China＇s Foreign Trade interviewed Mr. Yoichi Maine, Deputy Director General of JETRO BEIJING.     

Auto Parts Market Potential Coming into Surface

Looking at the increasingly fierce competition in the world auto market. global automobile manufacturing industry, taking Europe, the U.S. and Japan as representatives, is gradually forming a new type of relationship, mutual cooperation between whole vehicle and parts manufacturers. We can clearly see that auto parts manufacturers have become independent from the whole vehicle manufacturing companies, which means that the former structure of auto industry has greatly changed, and a new relationship,     

Public Financial Expenditure——A Reflection of the Livelihood Improvement

In recent years.China's public finance put social construction high on the agenda and attaches more importance on livelihood insurance and improvement.The 2003-2007 public financial expenditure reflects a fact that the government isputting more emphasis on livelihood andissues concerning the people.     

Voices from the MPC and CPPCC

"Crucial for economic growth.energy utilization has its role in all economic sectors and every aspect of people's daily life.Now we are in dire need of a new profession,namely energy manager.We not only need to have passion and responsibility,but also a scientific approach to conserve energy and cut emissions.APpropriate legislation should be in place.and a special profession should be introduced to ensure the implementation of these laws and regulations."