✦ LIBER ✦

In situ concentration of mercury vapour in a palladium-coated graphite tube: determination of mercury by atomic absorption spectrometry

✍ Scribed by Xiu-Ping Yan; Zhe-Ming Ni; Qin-Lin Guo

Publisher: Elsevier Science
Year: 1993
Tongue: English
Weight: 826 KB
Volume: 272
Category: Article
ISSN: 0003-2670
DOI: 10.1016/0003-2670(93)80381-t

No coin nor oath required. For personal study only.

✦ Synopsis

A method was developed for the determmabon of mercury by cold vapour generation electrothermal atonuc absorption spectrometty mth m mtu concentration m a palladmm-coated graphite tube The mercury vapour generated by using NaBH, IS rapidly trapped m the graphite tube, coated with PdCl,, at 250°C and atormzed at 2200°C The expertmental results show that the trapping efficiency for mercury by PdCl, IS better than that by reduced palladium Redution of PdCl, to palladmm metal gives less favourable mercury trappmg Calibration IS aclueved wtth sunple aqueous solutrons An absolute detection hnut (3~) of 314 pg, correspondmg to a concentration detection hnut of 628 pg I-' for SO-ml samples, 1s obtained The charactenstx mass IS 114 pg The prectsion for ten replicate determmabons IS 2 0% (relattve standard devlabon) at the I-ng level and 18% at the 5-ng level The method was successfully apphed to the determmation of mercury m certified water samples, sea water and waste water The most favourable aspects of the method are its simplicity, high-speed and good reproducxlxhty

📜 SIMILAR VOLUMES

Determination of mercury in urine by flo

Determination of mercury in urine by flow-injection cold vapour atomic absorption spectrometry

✍ Tiezheng Guo; Jörn Baasner 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 643 KB

A simple, rapid and accurate method was developed for the determination of total mercury in urine samples . The method uses on-line addition of KMnO4 after adding a bromate-bromide reagent to the sample to decompose organic mercury compounds to inorganic mercury(II) ions at room temperature, and det

Microwave dissolution for the determinat

Microwave dissolution for the determination of mercury in fish by cold vapour atomic absorption spectrometry

✍ M. Navarro; M.C. López; H. López; M. Sánchez 📂 Article 📅 1992 🏛 Elsevier Science 🌐 English ⚖ 317 KB

A procedure IS described for the determmatlon of mercury III fish species from the Mediterranean Spamsh coast by cold vapour atomic absorption spectrometly The samples were decomposed wth mtnc acid m a mlcrowave acid digesuon bomb A certd'ied reference sample was analysed and the results obtamed agr

Thiol group determination in proteins by

Thiol group determination in proteins by flameless atomic absorption spectrometry of mercury

✍ Jens B. Carlsen 📂 Article 📅 1975 🏛 Elsevier Science 🌐 English ⚖ 320 KB

The flameless atomic absorption procedure for determination of minute amount of mercury has been adapted for measuring thiol-groups in native and denatured proteins. The excess of p-hydroxymercuribenzoate is removed by gel filtration after its reaction with the protein. The protein-p-hydroxymercurib

Alternative mercury-palladium chemical m

Alternative mercury-palladium chemical modifier for the determination of selenium in coal fly ash by graphite furnace atomic absorption spectrometry

✍ C. García-Olalla; A.J. Aller 📂 Article 📅 1992 🏛 Elsevier Science 🌐 English ⚖ 587 KB

An altematlve chenucal modlfier contammg HgCI,-PdC12 was used to develop an accurate method for the determmatlon of selemum m coal By ash Wall atomlzatlon and the Snutb-Hleftle background correctlon method were used The determmatlon was done either by the standard addltlons method or by usmg a cahbr

Optimization of Microwave Digestion for

Optimization of Microwave Digestion for Mercury Determination in Marine Biological Samples by Cold Vapour Atomic Absorption Spectrometry

✍ Nicola Cardellicchio; Antonella di Leo; Santina Giandomenico; Stefania Santoro 📂 Article 📅 2006 🏛 John Wiley and Sons 🌐 English ⚖ 66 KB 👁 2 views

Determination of Total Mercury in Biolog

Determination of Total Mercury in Biological Materials by Cold Vapor Atomic Absorption Spectrometry after Microwave Digestion

✍ Ujang Tinggi; Graham Craven 📂 Article 📅 1996 🏛 Elsevier Science 🌐 English ⚖ 57 KB

The use of several acid mixtures for digestion of marine biological materials with microwaveassisted heating was investigated. The mixtures of HNO 3 -H 2 SO 4 -H 2 O 2 and of HNO 3 -H 2 SO 4 -HCl were most effective after microwave digestion, resulting in complete decomposition of samples. Recoverie