土壤中（类）金属及其化合物检测方案

analytikjenaAGanalytical solutions analytikjenaAG 04/97 AA_HydrEA_01_97_e Summary of analytical results Determination of Arsenic and Selenium in soil， fodder， and plantsusing the AAS 5 HydrEA 1 Chemicals and reagents 1.1 Sodium Borohydride p. A. (Merck： 1.06371.0100) 1.2 Sodium Hydroxide p. A. . (Merck： 1.06469.1000) 1.3 Reducing agent 3%NaBH4；1% NaOH 9 g NaBH4(1.1) and 3 g NaOH (1.2) were dissolved in 300 ml deionized water. (can be stored for 1 month in the refrigerator) 1.3.1 Reducing agent0.3%NaBH4；0.1%NaOH Reducing agent 3 %，1%(1.3) 1：10 diluted with deionized water. 1.4 Hydrochloric Acid suprapure 30 % (Merck： 1.00318.1000) 1.5 Iridium-standard solution 1000 mg/l Ir in 20 % HCI (Alfa， Johnson Matthey GmbH： 88072) Potassium lodide Ascorbic Acid 2. Sample preparation Selenium Soil Aqua regia dissolution： 5 g/ 100 ml (1.5%) analytical solutions 04/97 AA_HydrEA_01_97_e 3. Measurement range and detection limit Selenium Matrix Normal content Measurement range Effective detection lilimit mg/kg TS ug/l mg/kg TS (n. DIN32645) 一 Soil 0.02-2 0...10 (0.2 ug/l) 1 ml sample sol.： 0.060 Fodder 0.1 5 ml sample sol.： 0.012 5 ml sample sol.：0.020 Arsenic Matrix Normal content Measurement range Effective detection limit mg/kg TS ng mg/kg TS Plants 0.01-5 0-5 (0.2ng) 1 ml sample sol.： 0.010 l4. Analytical limits Arsenic ug/l pg/l ug/1 90%： 0.20370 0.40740 0.91778 95%： 0.31501 0.63002 1.32647 99%： 0.73709 1.47418 2.82162 The analytical limits were determined for the signal heights. 5. Comparison of methods for Hydride-AAS and HS-GF-AAS Arsenic mg/kg TS mg/kg TS 0.18 0.18 < 0.05 0.054 <0.05 0.031 0.063 0.081 0.10 0.12 0.080 0.081 0.13 0.070 0.076 <0.05 0.044 04/97 AA_HydrEA_01_97_e mg/kg ts mg/kg TS < 0.05 0.078 <0.05 0.033 <0.05 0.049 <0.05 0.091 < 0.05 0.051 <0.05 0.016 <0.05 0.036 <0.05 0.012 6. Reference materials Selenium certified/ declared measured mg/kg mg/kg CRM IAEA Soil7 0.4 0.5±0.1 Comparative sample/TLL Soil 1 0.25 0.26±0.05 Soil 2 0.43 0.43±0.07 Soil 3 0.56 0.5 ±0.1 Arsenic Apple leaves 0.038 0.048±0.010 Peach leaves 0.06 0.065±0.012 Creates