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1) 相比于传统单孔石墨管，在锑含量很低(6μg/L的数量级)的情况下，使用双孔石墨管不需要延长干燥时间，就可以用大的进样量，来保证吸收强度，提高精度
2) 双孔石墨管能直接准确测定0.2μg/L浓度的锑，而且不需要浓缩或其他前处理过程，简化操作过程，提高实验效率
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Hitachi High-Technologies Corporation Analysis of Sb in River Water (Electrothermal Method) ZA3000 INTRODUCTION ： By using the twin injection function， newly installed to the ZA3000 series， antimony in river water was analyzed. By using the specially designed twin cuvette (Pyro D HR)， a sample is injected into two different injection ports. As a result， the analysis can be performed without extending the drying time even when a large sample volume is injected. By a conventional instrument， it was difficult to detect 0.2 pg/L of antimony， 1/10 of the water quality standard concentration， without in-furnace concentration or other preparations. With the twin injection function， the detection without the concentration is possible， resulting in the improved measurement throughput. INSTRUMENT CONDITIONS MEASUREMENT PARAMETERS GA AUTOSAMPLER Element ： Sb Instrument ：ZA3000 Atomization ：GA Wavelength ： 217.6nm Lamp Current ：10.0mA Slit Width ： 0.4 nm Cuvette ： Pyro D HR Meas. Mode ： Working Curve Signal Mode ： BKG CorrectedCurve Order ：Linear Calculation ： Peak Height Time Constant：： 0.1 sec Temp. Control：：ON Sample Volume ： 70 uLAddition ： Speed：4 MATRIX MODIFIER Matrix Modifier ： 1000 mg/L Pd+MgVolume： 10 uL Order ： After TEMPERATURE PROGRAM NOTE Stage Initial/Final Heating/Keeping Gas Flow Rate Gas Temperature (C) (SeC) (mL/min) 1 Drying 50/110 40/0 200 Normal 2 Incineration 3 Atomization 2300/ 2300 110/300 20/0 200 Normal800/800 20/0 200 Normal0 /2 0 Normal 4 Cleaning 2800/2800 0/4 200 Normal Pyro D HR， the cuvette specially designed for twin injection， was usedfor the analysis. The sample was prepared by addingantimony to JSAC 0301 River Water Certified Reference Material to make a concentration of 0.2 pg/L. CONC(pg/L) Mean ABS SD RSD REF ABS 0.06- 2 STD 1 0.000 0.0032 0.0005 15.63% 0.2579 一 STD 2 0.500 0.0156 0.0008 5.13% 0.2785 一 STD 3 1.000 0.0294 0.0002 0.68% 0.2815一 1 STD 4 2.000 0.0522 0.0002 0.38% 0.2874 0.03 0.5 1 ND 0.0034 0.0006 17.65% 0.3406 2 0.197 0.0082 0.0001 1.22% 0.3463 0 R2：0.9992 0.00 ABS 0 1 2 KEY WORDS Atomic Absorption Photometer Environmental Analysis Related， Environmental Water， Clean Water， (AA) Environmental Chemistry， River Water， Antimony， Sb， Flameless， Graphite Furnace， AA， ZA3000， GA， Pyro D HR， Environment Sheet No. AA120006-00
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日立科学仪器（北京）有限公司为您提供《河水中重金属检测方案(原子吸收光谱)》，该方案主要用于环境水（除海水）中（类）金属及其化合物检测，参考标准--，《河水中重金属检测方案(原子吸收光谱)》用到的仪器有日立ZA3000系列原子吸收分光光度计
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