Determination of Trace Extractable Lead in Artificial Acid Sweat from Ecological Textiles by GFAAS
LIU Chong-hua1, FANG Han1, LIN Xiao-yang2, ZHANG Xiao-li1, DENG Zhi-guang1, LI Yun-song2
1. Guangdong Inspecting and Quarantine Technology Center, Guangzhou 510623, China 2. Zhongshan Entry-Exit Inspection and Quarantine Bureau, Zhongshan 528403, China
Abstract：Extractable trace level lead in artificial sweat solution from ecological textiles is a key item limited by eco-textile standard. But the content of this extractable Pb is not so easy to determine for the strict limit of eco-textile standard, the complicatedness of extractable solution matrix and the strong background interference of NaCl. In the present paper a method for the determination of trace extractable lead in artificial acid sweat from ecological textiles by graphite furnace atomic absorption spectrometry (GFAAS) is described. Based on a number of experiments by using different single and mixed matrix modifiers including (NH4)2H2PO4, NH4NO3, Pd(NO3)2, Ni(NO3)2 and ascorbic acid，an effective modifier and its quantity were selected and the graphite furnace operating parameters were optimized. Experimental test results revealed that adding 5 mL (1∶1) mixed solution of 50 g·L-1 ammonium nitrate and 100 mg·L-1 palladium regent was an effective way to inhibit volatile lead and reduce background signals. The detection limit could reach a low level of 0.7 μg·L-1. The relative standard deviation was 3.2%. Under the optimum experimental conditions, the recoveries ranged between 95.5% and 105%.
Key words：GFAAS;Ecological textiles;Extractable lead
刘崇华1，方 晗1，林晓杨2，张晓利1，邓志光1，李云松2 . 石墨炉原子吸收光谱法直接测定生态纺织品萃取汗液中痕量铅[J]. 光谱学与光谱分析, 2009, 29(11): 3150-3153.
LIU Chong-hua1, FANG Han1, LIN Xiao-yang2, ZHANG Xiao-li1, DENG Zhi-guang1, LI Yun-song2 . Determination of Trace Extractable Lead in Artificial Acid Sweat from Ecological Textiles by GFAAS . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2009, 29(11): 3150-3153.
[1] Oeko-Tex Associationa(国际环保纺织协会标准). Oeko-Tex Standard 100 General and Special Condition(生态纺织品标准100通用及特殊技术要求). WWW. Oeke-Tex. com，2007. [2] Institute of Iextile Industry Standardize(纺织工业标准化研究所). GB/T 18885—2002(中华人民共和国国家标准). Technical Specification for Ecological Textiles(生态纺织品技术要求). Beijing: Standards Press of China(北京: 中国标准出版社), 2002. [3] HUO Jin-hua(霍金花). China Fiber Inspection(中国纤检),2006,(1)：18. [4] CHEN Jun, ZHENG Li(陈 军, 郑 利). Chinese Journal of Chemical Research and Application(化学研究与应用), 2001, 13(4): 363. [5] HU Yong-jie(胡勇杰). China Fiber Inspection(中国纤检), 2005, (4)：39. [6] LIU Chong-hua, LIU Ying, HUANG Li-na(刘崇华, 刘 瑛, 黄理纳). Textile Standard and Quality(纺织标准与质量)，2005，(1)：39. [7] MENG Lie-qun, ZHAO Wei-jia(孟列群, 赵维佳). Chinese Journal of Spectroscopy Laboratory(光谱实验室), 2006, 23(1) ：115. [8] XIE Hua-lin, LI Li-bo, HE Hui, et al(谢华林，李立波，贺 惠，等). Textile Auxiliaries(印染助剂), 2004, 21(3)：48. [9] CAO Hui-jun，GUO Meng-jing(曹惠君，郭蒙京). Chinese Journal of Health Laboratory Technology(中国卫生检验杂志)，2005，15(4)：447. [10] Tianjin Entry & Exit Inspecting and Quarantine Burean(天津出入境检验检疫局). GB/T 17593.1(中华人民共和国国家标准). Textiles—Determination of Heavy Metals—Part 1: Atomic Absorption Spectrophotometry(纺织品 重金属离子检测方法 原子吸收分光光度法). Beijing: Standards Press of China(北京: 中国标准出版社), 2006. [11] ISO 105-E04：1994(E)，Textiles-Tests for Colour Fastness-Part E04: Colour Fastness to Perspiration. [12] HU Xiao-ling，ZHANG Gui, LIU Zhi-feng(胡小玲，张 瑰，刘志峰). Chinese Journal of Health Laboratory Technology(中国卫生检验杂志)，2004，14(4)：428. [13] CHENG Zhi-chen，WANG Shu-lan，YANG Zhi-jie，et al(程志臣, 王素兰, 杨志杰, 等). Instrumentation Analysis Monitoring(仪器仪表与分析监测)，2000，(2)：57.
