Mercury.  Short-term storage of natural waters

Carr, R. A.; Wilkniss, P. E.

doi:10.1021/es60073a010

Cited by 41 publications

(6 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, this reduction in measured Hg concentration was greater at the higher concentrations compared to lower concentrations. A decrease in Hg concentrations after addition to water has been also reported by Sharp and Neff 17 and Laporte et al 6 The loss of Hg from the test solutions was due to volatilization, adsorption on the container walls 18,19 and uptake by the larval fish and Artemia nauplii. Based on these data, daily renewal of test solutions is recommended to ensure continuous exposure to the desired Hg concentrations for the duration of the tests.…”

Section: Data Analysis Data Analysis Data Analysis Data Analysis Datasupporting

confidence: 67%

Untitled

Thongra-ar¹,

Parkpian²,

Tang³

2003

ScienceAsia

View full text Add to dashboard Cite

Short-term chronic toxicity tests were conducted to investigate the adverse effects of mercury (Hg) on growth (measured as dry weight) and survival of seabass larvae, Lates calcarifer, and the modifying effects of salinity. Seven-day static-renewal tests were conducted at four salinities: 2, 10, 20 and 30 psu. The experiments were repeated three times for each salinity. Results indicated that seabass larvae were very sensitive to low concentrations of Hg. Based on the actual measured Hg concentrations, the mean NOEC, LOEC and LC 50 values for survival were 30.8, 52.5 and 46.2 µg L-1 , respectively, while the mean NOEC, LOEC, IC 25 and IC 50 values for growth were 5.2, 12.6, 8.5 and 19.2 µg L-1 , respectively. Salinity did not have any significant effects on the toxicity of Hg on survival and growth of seabass larvae. One possible explanation is that Hg preferentially forms very strong complexes with sulfhydryl groups (-SH) in proteins rather than with chloride.

show abstract

Section: Data Analysis Data Analysis Data Analysis Data Analysis Datasupporting

confidence: 67%

Untitled

Thongra-ar¹,

Parkpian²,

Tang³

2003

ScienceAsia

View full text Add to dashboard Cite

show abstract

“…Sample Storage. To preserve natural water samples for Hg analysis, much care must be exercised to prevent loss of Hg during storage (24)(25)(26). Coyne and Collins (24) recommended preacidification of the sample bottle with concentrated HNO3 to yield a final pH of 1 in the sample solution.…”

Section: Resultsmentioning

confidence: 99%

Cold-trap preconcentration method for the determination of mercury in sea water and in other natural materials

Wf¹,

Wb²,

Cd³

1974

Anal. Chem.

View full text Add to dashboard Cite

A cold-trap preconcentration procedure has been developed and incorporated into a standard flameless atomic absorption analysis of Hg in sea water and in other environmental samples. The cold-trap is created by the immersion In liquid N2 of a glass U-tube packed with glass beads (80/ 100 mesh). After reduction, purging, and trapping, the Hg is removed from the glass column by controlled heating, and the gas phase absorption of eluting Hg Is measured. This procedure has been employed for both shipboard and laboratory analyses of Hg In sea water and for the determination of Hg in mixed zooplankton (seston) and in oceanic manganese crusts. In sea water, a detection limit of 2 ng Hg/I. was attained.

show abstract

“…Wall-sorption of Hg has been extensively studied in the past 10,13,15,17,[20][21][22] and the choice of sample container material has been noted as a major factor in mitigating this. Glass and PTFE containers are preferred for sampling Hg in waters, as wall sorption is greatly reduced in these materials.…”

Section: Preservation and Storage: Importance And Challengesmentioning

confidence: 99%