ethylenediaminetetra acetic acid (EDTA)
نویسندگان
چکیده
The kinetics of reducti on of Cr(VI) by thiourea has been studied spectrophotometrically in an HClO~ medium. The reaction follows overa ll third order kineti cs. first order each in Cr(V I), thi ourea and HCIO~. The react ion is HCIO~ catalyzed. Addi tion of M n(II ) and Ce( I V) ions largely decrease the reaction rate. The reaction rate is increased by add ition of EDTA. The spectrophotometri c study indica tes that the reduction of chromi um(V I) foll ows the sequence
منابع مشابه
Demineralization in organic solvents by alkylammonium salts of ethylenediaminetetra-acetic acid.
1. Insoluble salts of alklaine earth metals (e. g. calcium phosphate) dissolve in non-aqueous solvents containing EDTA salts of organic cations (e.g. tetraethylammonium). 2. Bone is efficiently demineralized in ethanolic trimethylammonium EDTA. Retention in the matrix of water-soluble materials (e.g. proteoglycan) is much better than in standard aqueous EDTA demineralization procedures.
متن کاملDetermination of lead chelated with ethylenediaminetetra-acetic acid in blood after precipitation of protein with perchloric acid.
Cernik, A. A. (1970). Brit. J. industr. Med., 27, 40-42. Determination of lead chelated with ethylenediaminetetra-acetic acid in blood after precipitation of protein with perchloric acid. A method is described for the determination of lead in whole blood containing ethylenediaminetetra-acetic acid. Proteins were precipitated by 2-0 M perchloric acid. The ionized lead in the supernatant was chel...
متن کاملEffect of EDTA and ACD on blood storage for the detection of Plasmodium falciparum by PCR.
Blood samples are extensively used for PCR-based diagnosis of microbial infections and screening for blood banking1. It is not possible to do PCR with fresh blood samples each time. This preliminary study is aimed to compare the effect of blood storage (–20oC) on PCR for detecting Plasmodium falciparum in the two most commonly used anticoagulants such as ethylenediaminetetra acetic acid (EDTA) ...
متن کاملThe Suitability of Some Copper Preparations for Parenteral Copper Therapy in Sheep
The storage of copper by adult Merino sheep of normal copper status has been measured in liver biopsy samples drawn at weekly intervals following subcutaneous and intramuscular injections of copper glycine cerate (90 mg Cu) and aqueous suspensions of copper calcium ethylenediaminetetra-acetic acid (EDTA) and copper methionine complexes (each 100 mg Cu) . The glycine and EDTA preparations safely...
متن کاملEffects of organic cations on the gram-negative cell wall and their bactericidal activity with ethylenediaminetetra-acetate and surface active agents.
When Gram-negative cell walls were damaged by lysozyme and ethylenediaminetetra-acetic acid (EDTA) in tris buffer, tris played an active role through its action as an organic cation. Other organic cations such as aliphatic amines and quaternary ammonium compounds were more effective than tris in modifying the cell wall and making it permeable to other solutes. The most effective organic cations...
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