ICS 77.120.99 H 14 XB Rare Earth Standard of the People's Republic of China XB/T 617.3-2014 Chemical analysis methods for neodymium iron boron al loyPart 3: Determination of boron, aluminum, copper, cobalt, magnesium silicon, calcium, vanadium, chromium manganese, nickel, zinc and gallium contentslnductively coupled plasma atomic emission spectrometry 铁合金化学分析方法第3部分：硼、铝、 铜、钴、镁、硅、钙、钒、铬、锰、镍、锌和 量的测定电感耦合等离子体原子发射光谱法 (Eng/ish Trans/ation) Issue date: 2014-10-14 Implementation date: 2015-04-01 XB/T 617. 3-2014 Foreword SAC/Tc 229 is in charge of this English translation.In case of any doubt about the contents of English translation, the Chinese original shall be considered authoritative. TheXB/T617Chemica/ana/ysismethodsforneodymiumironboron a//oyconsistsof the following seven parts: Part 1:Determination of tota/ rare earth content-Oxalate gravimetry; Part2:Determination offifteen REo re/ative contents; Part3:Determination of boron,aluminum, copper,coba/t,magnesium,si/icon, ca/cium,vanadium, chromium,manganese,nicke/,zinc andga//ium contents- Inductive/y coup/edplasma atomic emission spectrometry; Part 4: Determination of iron content-The potassium dichromate titrimetry: Part5:Determination of zirconium,niobium,mo/ybdenum,tungstenandtitanium contents-/nductive/y coup/edp/asmaatomic emission spectrometry; Part 6: Determination of carbon content-High frequency-infrared absorption method; -Part 7:Determination of oxygen and nitrogen contents-Impulse-infrared and impu/se-therma/conductanceabsorptionmethod. This is the third part of XB/T 617. This standard is drafted in accordance with the rules given in the GB/T 1.1-2009. This standard was proposed and prepared by the SAC/TC 229 (China Rare Earth Standardization Technical Committee). XB/T 617.3-2014 Chemical analysis methods for neodymium iron boron alloy -Part 3: Determination of boron, aluminum, copper, cobalt, magnesium, silicon, calcium, vanadium, chromium, manganese, nickel, zinc and gallium contents-lnductively coupled plasma atomic emission spectrometry 1 Scope This document specifies a method for the determination of boron, aluminum, copper, cobalt,magnesium, silicon, calcium,vanadium, chromium, manganese,nickel,zinc and gallium contents in neodymium iron boron al loy. Thisdocument is applicableto thedetermination ofboron,aluminum,copper,cobalt magnesium, silicon, calcium,vanadium, chromium, manganese, nickel,zinc and gallium contents in neodymium iron boron al loy.The determination ranges aregiven in Table 1. Table 1 Element Determination range/% B 0.80~1.30 Al,Cu, Si,V, Cr,Ga 0.010~0.50 Mg, Ca, Mn, Ni, Zn 0.0050~0.50 Co 0.0050~5.00 Theory 2 After dissolving with acid, the test portion is determined by inductively coupled plasma atomic emission spectrometry(IcP-AEs), and quasi-matrix matching method is used to correct matrix effect. Reagents and materials 3.1 Mixed solution of hydrochloric acid and nitric acid, diluted 3+1+4 3.2 Boron standard stock solution, 1 mg/mL: Weigh 5.7174 g of boric acid [w (H,B0.) ≥99.99%] and dissolve it in a small amount of water.Heat it at a moderate temperature till completely dissolved. Transfer it into a 1000 mL volumetric flask, dilute the solution to the mark with water and mix well. 3.3Aluminum standard stock solution,1mg/mL:Weigh1.0000g of aluminummetal[w (Al)≥99.99%) intoa300mL beaker,add 20mL of water and 3g of sodium hydroxide. After completely dissolved, slowly add hydrochloric acid (1+1) to neutralize until precipitation occurs, then excess 2o mL. Heat it to dissolve while stirring. After cooling, transfer it into a 1000 mL volumetric flask, dilute the solution to the mark with water and mix well. 3.4 Copper standard stock solution, 1mg/mL:Weigh 1.0000 g of copper metal [w (Cu) ≥99.99%], add 20 mL of nitric acid(1+1). Heat it at a moderate temperature till completely dissolved and evaporate to near dry. Then add 10 mL of sulfuric acid (1+1), 1 XB/T 617.3-2014 continue to evaporate careful ly until white fumes. Add water to extract after c