Home


History


Datasets


Sampling


Status


Methods


Compare


Counties

Download


DB Doc


Refs

As

Au, Pd, Pt

C, S

ICP40

ICP16

ICP10

Hg

NAA

Sb

Se

Te, Tl

W

XRF

NURE

Analysis of Antimony by Hydride-generation Atomic Absorption Spectrometry (USGS and XRAL laboratories)

Method

250-mg sample aliquots are weighed into Teflon vessels. A mixture of nitric and hydrochloric acids is added, and the mixture is left to stand for 3 hours. Hydrofluoric and perchloric acid is added, and the sample is heated overnight. After the solution is cooled, hydrochloric acid is added. The samples are diluted and analyzed for antimony using hydride generation atomic absorption spectrometry. Commercially available standards are used to calibrate the instrument. The optimum concentration range without sample dilution in various solid phase sample media is 0.6 ppm to 20 ppm. See Hageman and Welsch (1996) for further details about this method. Analytical data for an experimental run are deemed acceptable based on results determined for two in-house quality-control standards: recovery for all elements present at >5 times the detection limit must be within 20% of the certified value, and the calculated relative standard deviation of duplicate samples is no greater than 20%.

Data analysis

Distribution maps

Element
QA/QC
Conter-
minous
Alaska
Hawai`i
Sb (ppm) In progress no data