Microwave-Induced Combustion in Disposable Vessels: A Novel Perspective for Sample Digestion

A novel method for the determination of rhodium in rhodium-loaded carbon catalyst samples was established by inductively coupled plasma atomic emission spectrometry after samples digested by microwave oven with aqua regia. Such experiment conditions were investigated as the influence of sample digestion methods, digestion time, digestion temperature and interfering ions on the determination. Under the optimized conditions, the limits of detection (LODs) of Rh for tested solutions were 9 ng mL-1. The relative standard deviations (RSDs) for Rh were 2.11 (CRh = 1 mg L-1, n = 7). The linear ranges of calibration graphs for Rh were 0 ~ 150.00 mg L-1. The proposed method was applied to determine the practical samples with good recoveries and satisfactory results.

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Direct determination of metallic impurities in nuclear-grade boron carbide by slurry sampling total reflection X-ray fluorescence spectrometry and ICP atomic emission spectrometry subsequent to ultra-high-pressure sample digestion

Journal of the Iranian Chemical Society ◽

10.1007/s13738-021-02332-7 ◽

2021 ◽

Author(s):

Jian Yuan ◽

Shuo Feng ◽

Jianyong Cui ◽

Shouhua Sun ◽

Apeng Yu ◽

...

Keyword(s):

Direct Determination ◽

Atomic Emission ◽

Total Reflection ◽

Atomic Emission Spectrometry ◽

Emission Spectrometry ◽

Sample Digestion ◽

X Ray ◽

Ultra High Pressure ◽

Metallic Impurities

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Trichinella detection: Identification and statistical evaluation of sources of error in the magnetic stirrer method for pooled sample digestion

Veterinary Parasitology ◽

10.1016/j.vetpar.2013.01.031 ◽

2013 ◽

Vol 194 (2-4) ◽

pp. 106-109 ◽

Cited By ~ 8

Author(s):

Katharina Riehn ◽

Dirk Hasenclever ◽

David Petroff ◽

Karsten Nöckler ◽

Anne Mayer-Scholl ◽

...

Keyword(s):

Statistical Evaluation ◽

Sample Digestion ◽

Sources Of Error ◽

Magnetic Stirrer ◽

Pooled Sample

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Sample Digestion and Combined Preconcentration Methods for the Determination of Ultra-Low Gold Levels in Rocks

Molecules ◽

10.3390/molecules24091778 ◽

2019 ◽

Vol 24 (9) ◽

pp. 1778

Author(s):

Yan-hong Liu ◽

Bo Wan ◽

Ding-shuai Xue

Keyword(s):

Inductively Coupled Plasma ◽

Direct Determination ◽

Important Indicator ◽

Fire Assay ◽

Sample Digestion ◽

Inductively Coupled ◽

Plasma Mass Spectrometry ◽

Solid Adsorbents ◽

Exchange Resins

The gold abundance in basic rocks, which normally varies between 0.5 and 5 ppb, has served as a very important indicator in many geoscience studies, including those focused on the planetary differentiation, redistribution of elements during the crustal process, and ore genesis. However, because gold is a monoisotopic element that exhibits a nugget effect, it is very difficult to quantify its ultra-low levels in rocks, which significantly limits our understanding of the origin of gold and its circulation between the Earth crust, mantle, and core. In this work, we summarize various sample digestion and combined preconcentration methods for the determination of gold amounts in rocks. They include fire assay, fire assay combined with Te coprecipitation and instrumental neutron activation analysis (INAA) or laser ablation inductively coupled plasma mass spectrometry, fusion combined with Te coprecipitation and anion exchange resins, dry chlorination, wet acid digestion combined with precipitation, ion exchange resins, solvent extraction, polyurethane foam, extraction chromatography, novel solid adsorbents, and direct determination by INAA. In addition, the faced challenges and future perspectives in this field are discussed.

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Losses from cattle faeces during chemical analysis

Australian Journal of Experimental Agriculture ◽

10.1071/ea9740716 ◽

1974 ◽

Vol 14 (71) ◽

pp. 716 ◽

Cited By ~ 3

Author(s):

L Falvey ◽

A Woolley

Keyword(s):

Dry Matter ◽

Nitrogen Loss ◽

Routine Method ◽

Drying Time ◽

Sample Digestion ◽

Faecal Material ◽

Kjeldahl Method ◽

Cattle Faeces ◽

Nitrogen Contents

The effects of drying temperature and method of sample digestion on the determination of nitrogen and dry matter in the faeces of cattle grazing pastures of two different nitrogen contents were examined. Nitrogen loss varied from 8 to 20 per cent depending on the temperatures and associated length of drying time. The variation in the loss between samples from animals grazing the two pastures was small, tending to be higher for the samples taken from animals grazing a higher nitrogen pasture. Sample digestion by the H2SO4-H2O2 method was found to be as satisfactory as the micro-Kjeldahl method. Drying at 100�C for 24 hours gave the least loss of nitrogen. This procedure in conjunction with the H2SO4-H2O2 , digestion is proposed as a routine method for determination of nitrogen in faecal material.

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