GB/T 17141-1997: Translated English of Chinese Standard. (GBT 17141-1997, GB/T17141-1997, GBT17141-1997): Soil quality - Determination of lead, cadmium - Graphite furnace atomic absorption spectrophotometry
This Standard specifies the graphite furnace atomic absorption spectrophotometry for determining the lead and cadmium in the soil.
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Annex A Normative Determination of the water content in soil sample
1,000mL volumetric flask 20mL of nitric 25mL volumetric flask 2mm nylon sieve 3.2 for preparation 50mL beaker Accurately WEIGH 0.5000g acid in Section acid solution 3.3 ADD 20mL agate aqueous diammonium hydrogen Argon atomic absorption spectrophotometry cadmium contents cadmium in test cadmium stock solution cadmium working mixture Calibration curve constant volume contents become viscous crucible for slight DETERMINE the absorbance diammonium hydrogen phosphate electric hot plate evenly for standby f-Water content furnace atomic absorption g/mL Graphite furnace atomic guaranteed reagent hollow cathode lamp hydrochloric acid hydrofluoric acid 3.5 instrument instruction manual KEEP on heating lead and cadmium mg/kg nitric acid 3.2 nitric acid solution perchloric acid 3.6 phosphate solution 3.7 Precision and Accuracy relative standard deviation SHAKE evenly soil sample passing solution for dissolution spectral pure metallic Standard lead standard solution teflon crucible temperature test pieces test solution TRANSFER the solution unit of g water content WEIGH 0.5000g ACCURATE