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Beats By Dre Headphones, the following measured by experimental methods. S = × 100 set in pan of listless Weigh 0.2500 g sample in 250ml of high beaker Shen,
vibram five fingers outlet, adding 10mlHNO. (thick), heated to dissolve, the reaction stopped, cooling, adding 5mlHC1 (thick), steamed to the occurrence of white smoke, cooling, diluted with water to 100ml capacity Xiang 3 results were scheduled this Act listless' X-ray spectrometry deaf voltage light fruit song set goblets average bottle, shake well. draw 1O1n1 test solution, placed in 300ml conical flask, the following by experimental methods. 6.3 Law listless be friends with the measured results of six kinds of samples, the results in Table 3, if careful operation, results are accurate, high precision, coefficient of variation CV = 1.85 ~ 5. 1O. References 1 Schwarzenbach G, Fulashika H co, Tian any particular translation. training sets to determine the law. Beijing - Metallurgical Industry ffl sampan community, 1981.2902KinnunenJetaI.ChemjstAnalyat, 19G7.4c (1) l343I I Ang Mo Mu Qian Chimica Sinica '1964, 3o (4),
herve leger toronto, 3304 King feud Division. Rock and Mineral Analysis, 1991,1 o (i) te4S {fl Liuzhou Iron Works Central Laboratory of Analytical Chemistry, 1978,6 (2) q616 Wang Xian Branch, LI Yu-ping and non-ferrous metal dilute ± applications, 1994, (1) * 407 Wang Xi Division - twin Yuping plating and environmental -199 14 (2) -338 Queensland Chapter bar {Bai Pandan pray, 1994,14 (4) , tetrahedrite 9 Xiao Jinrong - Jinan University (Natural Science dirty), 1980 (2)-1O61O antagonistic Lin DD with Deng new Kam translation of chemical reactions cancer beans reconciliation dared. Beijing Science ffl Press, 19 body .34 l1HalljdaYCG, LeonardMA. TheAnalyst. 198,112 (1) t83DeterminationofTinwithSelectiveChelatometryUsin gtheSaltofDL-CysteineasReleasingAgentWangXiankeLiYuping (LanzhouDonggangzhenSteelworks, Lanzhou730020) AhstractAsimpleselectivechelatometryfordeterminati onofSninalloysandinoresamplesisputforwardinthispap er.Sn (Ⅳ), Sn (Ⅱ) andothermetallicionscanbeehalatedwithEDTA, andthechelatecompoundcanbedecomposedbythesaltofDL = cysteine.EDTAisaddedinexc ~ s, therema-inedEDTAisthantitratedwithPb: standardsolutionatPH5 ~ 6withXO-MTB-CPBasmixedindicator, afterthatthesaltofDL -: cysteinei8addedtodecomposethechelatecompoundsofSnY andSnY ~. theEDTAreleasediack-titratedwithPbstandardsolution.Theinterferenceofva riedanionsarestudied.Resultsshowthatcommonmetallic ionsdonotinterfere.KeyWordsTin,
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