Stannous chloride-an effective reducing agent for the removal of selenium(IV) from acidic solution

2012 ◽  
Vol 87 (7) ◽  
pp. 983-989 ◽  
Author(s):  
Nicolas Geoffroy ◽  
George P. Demopoulos
Keyword(s):  
Stannous Chloride ◽  
Acidic Solution ◽  
Reducing Agent

FURTHER OBSERVATIONS ON THE DETERMINATION OF PHOSPHATE BY PHOTOELECTRIC COLORIMETRY

1939 ◽  
Vol 17b (6) ◽  
pp. 178-191 ◽  
Author(s):  
G. R. Smith ◽  
W. J. Dyer ◽  
C. L. Wrenshall ◽  
W. A. De Long
Keyword(s):  
Ferric Iron ◽  
Stannous Chloride ◽  
Reducing Agent ◽  
Factors Affecting

A study of factors affecting the ceruleomolybdate reaction for phosphate is reported. The concentrations of stannous and stannic ions, the presence of extraneous salts, and temperature are important factors affecting the intensity and stability of the blue colour.The stannous chloride reagent should be preserved from oxidation by storing it under hydrogen.The interference by ferric iron is due largely to its reaction with the reducing agent, and may be avoided by diluting the sample to contain 0.1 p.p.m. of phosphorus and using two or three times the usual quantity of stannous chloride.

THE DETERMINATION OF NUCLEOTIDE PHOSPHORUS WITH A STANNOUS CHLORIDE - HYDRAZINE SULPHATE REAGENT

1964 ◽  
Vol 42 (2) ◽  
pp. 287-292 ◽  
Author(s):  
R. O. Hurst
Keyword(s):  
Light Absorption ◽  
Stannous Chloride ◽  
Reducing Agent ◽  
Accurate Estimation ◽  
Molybdenum Blue ◽  
Colorimetric Measurement ◽  
Highly Sensitive ◽  
Hydrazine Sulphate

Stabilization of stannous chloride as reducing agent for the analysis of phosphorus by the molybdenum blue method has been achieved by combining it with hydrazine sulphate. Application of the procedure to the determination of inorganic and nucleotide phosphorus is described. Colorimetric measurement of light absorption is made at 700 mμ, permitting a highly sensitive and accurate estimation of phosphorus.

scholarly journals Influence of Experimental Conditions on Deposition of Silver Nanoparticles Onto Surface of Graphene Oxide / Wpływ Warunków Eksperymentalnych Na Proces Osadzania Nanocząstek Srebra Na Powierzchni Tlenku Grafenu

2015 ◽  
Vol 60 (4) ◽  
pp. 2631-2636
Author(s):  
M. Wojnicki ◽  
I. Mania ◽  
M. Marzec ◽  
M. Gajewska ◽  
K. Mech
Keyword(s):  
Silver Nanoparticles ◽  
Graphene Oxide ◽  
Alkaline Solution ◽  
Acidic Solution ◽  
Deposition Process ◽  
Reducing Agent ◽  
Experimental Conditions ◽  
Initial Concentration ◽  
The Impact

Present work describes the influence of silver nanoparticles precursor form as well as the impact of graphene oxide initial concentration on deposition of the silver nanoparticles onto graphene oxide. Borane dimethylamine complex (DMAB) was used as the reducing agent. It was observed that application of silver ammonia complexes as the silver nanoparticles precursor as well as alkaline solution effect in higher quantity of deposited AgNPs in comparison to deposition process with the use of silver(I) nitrate in acidic solution.

Mutational potentiality of stannous chloride: an important reducing agent in the Tc-99m-radiopharmaceuticals

1998 ◽  
Vol 408 (2) ◽  
pp. 129-135 ◽  
Author(s):  
Rosa E.C. Cabral ◽  
Alvaro C. Leitão ◽  
Claudia Lage ◽  
Adriano Caldeira-de-Araújo ◽  
Mario Bernardo-Filho ◽  
...  
Keyword(s):  
Stannous Chloride ◽  
Reducing Agent

scholarly journals H2S concentrations in the heart after acute H2S administration: methodological and physiological considerations

2016 ◽  
Vol 311 (6) ◽  
pp. H1445-H1458 ◽  
Author(s):  
Takashi Sonobe ◽  
Philippe Haouzi
Keyword(s):  
Detection Limit ◽  
Acidic Solution ◽  
Reducing Agent ◽  
Male Rats ◽  
Toxic Exposure ◽  
Solution Ph ◽  
Method Of Determination ◽  
Alkaline Conditions ◽  
Total Disappearance

In this study, we have tried to characterize the limits of the approach typically used to determine H2S concentrations in the heart based on the amount of H2S evaporating from heart homogenates—spontaneously, after reaction with a strong reducing agent, or in a very acidic solution. Heart homogenates were prepared from male rats in control conditions or after H2S infusion induced a transient cardiogenic shock (CS) or cardiac asystole (CA). Using a method of determination of gaseous H2S with a detection limit of 0.2 nmol, we found that the process of homogenization could lead to a total disappearance of free H2S unless performed in alkaline conditions. Yet, after restoration of neutral pH, free H2S concentration from samples processed in alkaline and nonalkaline milieus were similar and averaged ∼0.2–0.4 nmol/g in both control and CS homogenate hearts and up to 100 nmol/g in the CA group. No additional H2S was released from control, CS, or CA hearts by using the reducing agent tris(2-carboxyethyl)phosphine or a strong acidic solution (pH < 2) to “free” H2S from combined pools. Of note, the reducing agent DTT produced a significant sulfide artifact and was not used. These data suggest that 1) free H2S found in heart homogenates is not a reflection of H2S present in a “living” heart and 2) the pool of combined sulfides, released in a strong reducing or acidic milieu, does not increase in the heart in a measurable manner even after toxic exposure to sulfide.

Sodium Hypophosphite as Reducing Agent for Determination of Submicrogram Quantities of Mercury in Animal Feeds and Manures

1981 ◽  
Vol 64 (1) ◽  
pp. 9-13
Author(s):  
Amer El-Ahraf ◽  
W Van Willis ◽  
Dutt V Vinjamoori
Keyword(s):  
Analytical Procedure ◽  
Stannous Chloride ◽  
Reducing Agent ◽  
Sodium Hypophosphite ◽  
Acid Digestion ◽  
Accuracy And Precision ◽  
Wide Range ◽  
Mineral Acids ◽  
Absolute Detection Limit

Abstract The reduction of mercury in samples of dairy cattle and chicken feed rations and manures prepared by acid digestion for determination by flameless atomic absorption is rapidly, smoothly, and quantitatively effected by sodium hypophosphite. The reducing agent is air-stable, is effective over a wide range of mercury concentrations, and is useful in the presence of many mineral acids commonly used for wet digestion of these matrices. The accuracy and precision obtained in determinations with this reagent are equivalent to those obtained using stannous chloride at the same conditions. Recovery efficiencies for the total analytical procedure were studied using cattle manure and feed rations spiked to 0.6 ppm Hg as phenylmercuric nitrate; the range of recoveries varied from 93 to 102% (97% average). The absolute detection limit of the method is 10 ng Hg, and the precision varies in the range of 2.2-6% for samples containing 3 ppt-10 ppm Hg. The advantages of sodium hypophosphite lie in the elimination of premature reduction of mercury caused by traces of stannous chloride adhering to the walls of the reaction vessel, the elimination of several wash steps in the determination, and the long shelf life of the reagent.

Clinical Evaluation of Radio-Labelled Bleomycin for Tumor Detection

1978 ◽  
Vol 17 (06) ◽  
pp. 238-248
Author(s):  
H. Beekhuis ◽  
M.A.P.C. van de Poll ◽  
A. Versluis ◽  
H. Jurjens ◽  
M.G. Woldring ◽  
...  
Keyword(s):  
Clinical Evaluation ◽  
Acidic Solution ◽  
Tumor Detection ◽  
Neutral Solution ◽  
Normal Tissues ◽  
Patients With Cancer ◽  
Tumor Bearing

Investigations with bleomycin labelled with radionuclides other than 57Co in patients with cancer and in tumor-bearing animals are described. In patients 57Co-bleo appears to be a better tumor-seeking radiopharmaceutical than 111In-bleo, 99mTc-bleo or 197Hg-bleo. This can be explained by a higher stability in vivo and a better tumor-seeking property of 57Co-bleo and less disturbing activity in the cardiac pool and in bone and other normal tissues when assessing the scintigram.Results with 111In-bleo labelled in acidic solution are not essentially different from those with 111In-bleo labelled in neutral solution.Results of 197Hg-bleo are almost identical with those of 197HgCl2 regarding the tumor-seeking effect as well as the distribution in normal tissues and organs. Probably the complex of 197Hg to bleomycin is not stable in vivo. The superiority of 57Co-bleo over 99mTc-bleo, 197Hg-bleo and also over 67Cu-bleo is confirmed by experiments on tumor bearing animals.We may conclude that the indication for use of bleomycin as a tumor-seeking pharmaceutical labelled with 111In, 99mTc, 197Hg or 67Cu seems to be very limited.

Carbon Monoxide Related Reductions

INEOS OPEN ◽  
2020 ◽  
Vol 3 ◽  
Author(s):  
O. I. Afanasyev ◽  
◽  
D. Chusov ◽  
Keyword(s):  
Organic Chemistry ◽  
Carbon Monoxide ◽  
Reducing Agent ◽  
Current Development ◽  
Efficient Route ◽  
Development Prospects

Carbon monoxide is a unique reducing agent that is only gaining popularity in organic chemistry. This review highlights the main approaches to the application of CO as a reducing agent, summarizes and critically analyzes the key trends in this field, and describes the current development prospects. Potentially the most selective and efficient route for the realization of these processes is demonstrated.

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