Determination of ultra-micro amounts of sulfur in igneous rocks by spectrofluorimetry using 2-(o-hydroxyphenyl) benzoxazole derivatization and tin(II)-strong phosphoric acid-assisted reduction

Hong, Yang; Namgung, Sung-Woo; Yoshida, Minoru; Malik, Abdul

doi:10.1016/s0039-9140(99)00263-5

Cited by 5 publications

(9 citation statements)

References 19 publications

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“…117,119), which is likely conservative for our purposes, and explore a range of [S] ig values between 10 and 1000 ppm. This range is meant to be inclusive and encompasses measurements of a wide range of extrusive, plutonic, felsic, and mafic igneous rocks [120][121][122][123][124][125][126][127] . Our preferred estimate for the overall average igneous sulphur content (300 ppm; ref.…”

Section: The Balance Between Igneous and Sedimentary Sulphur Sourcesmentioning

confidence: 99%

Long-term sedimentary recycling of rare sulphur isotope anomalies

Reinhard

Planavsky

Lyons

2013

Nature

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Sulphur Isotope Database:An extensive sulphur isotope database was used in the construction of Main Text Figure 1. These data were compiled from primary references 1-37 , although in some cases age constraints for certain units were obtained from other sources [38][39][40][41] or estimated. For Main Text Figure 1b, we calculated the cumulative average ∆ 33 S value for all samples up to each year of publication. The average values reported here thus include some contribution from sulphate minerals. However, the overwhelming majority of the data are sulphide mineral phases, and given that most sulphate data are characterized by negative ∆ 33 S values their inclusion will largely attenuate the pattern emphasized here, rendering our argument conservative. Furthermore, the overall effect of their inclusion is quite small (Fig. S1a,b). We also examined the effect of filtering data from analyses made via secondary ion mass spectrometry (SIMS) and analyses of macroscopic pyrite textures, which are not likely to be representative of bulk weathering crust, but again note that the basic pattern remains unchanged (Fig. S1a,b).The mean ∆ 33 S values shown in Fig. 1 are presented as unweighted averages. We consider this approach qualitatively justified, in that the database is composed largely of fine-grained siliciclastic sedimentary rocks that are relatively organic carbon and sulphur rich. Such rocks will not only be, on average, the most sulphur-enriched phases of the crust, but they will also likely hold the majority of the weathering sulphur reservoir at Earth's surface. Nonetheless, it is important to consider the possibility that there is a bias related to systematic relationships between the sulphur content of sedimentary rocks and their ∆ 33 S value. For this purpose, we compiled the available sulphur concentration data for the units within the isotope database and performed concentration-weighted statistical analyses.There does not appear to be any systematic relationship between rare sulphur isotope composition and sulphur content within the database (Fig. S2a). In addition, the cumulative unweighted average is nearly indistinguishable from the concentration-weighted average within this subset of the database (Fig. S2a,b). When the evolution of the overall ∆ 33 S value of the database is concentration-weighted, it shows a generally similar pattern through time to that of the overall mean values (Fig. S2b). Indeed, the mean ∆ 33 S value when weighted by concentration is more positive than the unweighted mean for a given population from the database. We stress the caveat that many of the published rare sulphur isotope datasets do not contain sulphur concentration data, so unfortunately this analysis cannot be performed on the entire database. However, the coupled isotope and concentration data represent well over 500 samples that range in sulphur content over three orders of magnitude. These considerations lead us to conclude that the pattern expressed in the overall mean ∆ 33 S values through time is robust and is ...

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Section: The Balance Between Igneous and Sedimentary Sulphur Sourcesmentioning

confidence: 99%

Long-term sedimentary recycling of rare sulphur isotope anomalies

Reinhard

Planavsky

Lyons

2013

Nature

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“…This aspect is even more relevant in the case of sulfur determination, as the ubiquity of the element, the high volatility of many of its compounds, and the obvious impossibility to use sulfuric acid as reagent to help dissolve the sample, make it difficult to obtain reliable results when digestion approaches are attempted. In particular, the potential for suffering from analyte losses can be very serious, and it is not surprising that protocols for sulfur determination often include many steps (e.g., reduction to hydrogen sulfide, trapping of the latter in a solution by precipitation, and redissolution of the formed compound) to minimize this risk, 14 at the cost of sample throughput.…”

Section: Introductionmentioning

confidence: 99%

Direct determination of sulfur in solid samples by means of high-resolution continuum source graphite furnace molecular absorption spectrometry using palladium nanoparticles as chemical modifier

Resano

Flórez

2012

J. Anal. At. Spectrom.

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“…The drawback of this method is that a huge amount (>0.4 g) of sample was required. Other methods such as X-ray fluorescence (XRF), infrared detection of SO 2 formed after high-temperature combustion, ion chromatography (IC), thermal ionization mass spectrometry (TIMS), or spectrofluorometry have also been applied. However, the first two methods require not only large amounts of samples but also standard materials with accurate sulfur contents, which need to be calibrated by other methods.…”

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confidence: 99%

Determination of Total Sulfur at Microgram per Gram Levels in Geological Materials by Oxidation of Sulfur into Sulfate with in Situ Generation of Bromine Using Isotope Dilution High-Resolution ICPMS

Makishima

Nakamura

2001

Anal. Chem.

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We have developed a new, simple, and accurate method for the determination of total sulfur at microgram per gram levels in milligram-sized silicate materials with isotope dilution high-resolution inductively coupled plasma mass spectrometry equipped with a flow injection system. In this method, sulfur can be quantitatively oxidized by bromine into sulfate with achievement of isotope equilibrium between the sample and spike. Detection limits for 32S+ and 34S+ in the ideal solution and silicate samples were 1 and 6 ng mL(-1) and 0.07 and 0.3 microg g(-1), respectively. The total blank was 46 ng, so that a 40-mg silicate sample containing 10 mirog g(-1) sulfur can be measured with a blank correction of < 10%. This total blank can be lowered to 8 ng if a low-blank air system is used for evaporations. To evaluate the applicability of this method, we analyzed not only silicate reference materials with sulfur content of 5.25-489 microg g(-1) and sample sizes of 13-40 mg but also the Allende meteorite with a sulfur content of 2%. The reproducibility for various rock types was < 9%, even though blank corrections in some samples of low sulfur content were up to 24%. This method is suitable for analyzing geological samples as well environmental samples such as soils, sediments, and water samples.

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Determination of ultra-micro amounts of sulfur in igneous rocks by spectrofluorimetry using 2-(o-hydroxyphenyl) benzoxazole derivatization and tin(II)-strong phosphoric acid-assisted reduction

Cited by 5 publications

References 19 publications

Long-term sedimentary recycling of rare sulphur isotope anomalies

Long-term sedimentary recycling of rare sulphur isotope anomalies

Direct determination of sulfur in solid samples by means of high-resolution continuum source graphite furnace molecular absorption spectrometry using palladium nanoparticles as chemical modifier

Determination of Total Sulfur at Microgram per Gram Levels in Geological Materials by Oxidation of Sulfur into Sulfate with in Situ Generation of Bromine Using Isotope Dilution High-Resolution ICPMS

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