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一些基本资料

附件内容：
1  Bibliographic Information

Determination of trivalent and quadrivalent manganese.      Fyfe, W. S.    Univ.,  Otago, Dunedin,  N. Z.    Anal. Chem.  (1951),  23  174-5.  CODEN: ANCHAM  ISSN: 0003-2700.  Journal  language unavailable.    CAN 45:18657    AN 1951:18657    CAPLUS 

Abstract

MnIV reacts with acetylacetone (I) to give a complex of MnIII with I and CH3COCHClCOCH3.  The latter reacts with acidified KI to give I and I2 which can be titrated with thiosulfate.  The complex of MnIII and I will not affect acidified KI.  The quantity of I2 formed is a measure of MnIV.  Since the compd. of FeIII and I is less stable than that of MnIII and I Fe3+ must be reduced to Fe2+. 

Indexing -- Section 7  (Analytical Chemistry)   

2,4-Pentanedione, chloro-, complex with Mn 
2,4-Pentanedione, chloro-, complex with acetylacetone 
Manganese, compd. with 2,4-pentanedione 
Manganese, compd. with chloroacetylacetone 
Role: PREP (Preparation)   

7439-96-5, Manganese 
    (analysis, detn.) 

123-54-6, 2,4-Pentanedione 
    (reactions of, with Mn(IV)







2    Bibliographic Information

Determination of manganese oxides of various valencies.      Bakcan, J.    Inst. Mineral Raw Materials,  Kutna Hora,  Czech.    Hutnicke Listy  (1959),  14  1084-6.  From: Anal. Abstr. 7, Abstr. No. 3244(1960).  CODEN: HUTLA7  ISSN: 0018-8069.  Journal  language unavailable.    CAN 58:43131    AN 1963:43131    CAPLUS 

Abstract

To the sample (0.05 g. of MnO) add 50 ml. 3M (NH4)2SO4, and heat on a water bath for 1 hr., stirring at 10-min. intervals.  Filter off the residue, wash with hot H2O, and det. Mn in the filtrate.  If alk. earths are present, the soln. and filtration must be carried out in an inert atm.  The amt. detd. corresponds to the MnO content, but also includes a small part of the Mn2O3 and a larger amt. of Mn from MnCO3.  MnO2 is detd. in the residue.  The difference between the total MnO2 detd. directly (below) and the MnO2 detd. in the residue corresponds to the Mn2O3 decompd. by (NH4)2SO1.  To det. MnO2, to the sample (0.04 g. of MnO2) add 0.5 g. KI, 10 ml. 0.1M EDTA, 0.5 g. NaOAc, and 10 ml. 5% HOAc, and mix in a closed flask for 7 min.  Dil. with H2O, and titrate with Na2S2O3.  To det. Mn2O3, dissolve the sample (0.08-0.1 g. of Mn2O3) by heating on a water bath with 60 ml. 1% HNO3 for 1 hr.  Filter off the residue, wash with hot H2O, and det. Mn++ in the filtrate.  The total amt. of Mn found corresponds to that from the MnO and half of that from the Mn2O3.  Transfer the filter with the residue to a flask, and det. MnO2 as described above.  The difference between the present amt. and that detd. directly by the above procedure corresponds to the second half of the Mn from Mn2O3.  The detn. of Mn2O3 can also be carried out by heating the sample on a water bath for 1 hr. in a mixt. of 100 ml. 10% Na4P2O7 and 2 ml. 1:1 H2SO4, filtering, adding a known vol. of 0.01M (NH4)2SO4.FeSO4, and titrating the excess manganometrically.  To det. Mn3O4, by decompg. the sample with HNO3, Mn++ is liberated from MnO, Mn2O3, and Mn2O4; MnO and Mn2O3 are detd. as above, and Mn3O4 by difference. 

Indexing -- Section 2  (Analytical Chemistry)   

Soils 
    (analysis, detn. of water)   

1317-34-6, Manganese oxide, Mn2O3 
1317-35-7, Manganese oxide, Mn3O4 
1344-43-0, Manganese oxide, MnO 
11129-60-5, Manganese oxide 
    (detn. of)









3  Bibliographic Information

The  spectrophotometric  determination of manganese(III) in the presence of manganese(IV).      Zhou, Huanchun; Mitamura, S.    Dep. Chem.,  Univ. Florida,  Gainesville,  FL,  USA.    Analytical Letters  (1992),  25(5),  911-18.  CODEN: ANALBP  ISSN: 0003-2719.  Journal  written in English.    CAN 116:247551    AN 1992:247551    CAPLUS 

Abstract

The spectra of the complex of Mn(III) and Mn(IV) with pyrophosphoric acid are investigated.  The molar absorption coeff. of the complex of Mn(III) with pyrophosphoric acid is 80.6/M-cm at 510 nm which is close to that of Mn(IV), 110/M-cm, however, the molar absorption coeff. of the complex of Mn(III) with pyrophosphoric acid is only 4.98/M-cm at 398 nm which is much less than that of Mn(IV), 390/M-cm.  Based on this absorbance difference between Mn(III) and Mn(IV) at wavelength 398 nm and 510 nm, a procedure of detn. of Mn(III) in the presence of Mn(IV) has been developed. 

Indexing -- Section 79-6  (Inorganic Analytical Chemistry)   

7439-96-5, Manganese, analysis 
Role: ANST (Analytical study) 
    (detn. of trivalent, in presence of tetravalent manganese, spectrophotometric) 

2466-09-3, Pyrophosphoric acid 
Role: ANST (Analytical study) 
    (in detn. of trivalent manganese in presence of tetravalent manganese) 

2466-09-3D, Pyrophosphoric acid, manganese complexes 
7439-96-5D, Manganese, pyrophosphoric acid complexes 
Role: PRP (Properties) 
    (visible spectra of) 

Supplementary Terms

manganese 3 detn manganese 4 present; spectrophotometry manganese 3 detn; pyrophosphoric acid reagent manganese 3 detn












4    Bibliographic Information

Bipotentiometric titrations with  standard  solutions of  manganese (III) and  manganese (IV).      Pastor, Tibor J.; Antonijevic, M. M.    Dep. Chem.,  Univ. Belgrade,  Belgrade,  Yugoslavia.    Analyst (Cambridge, United Kingdom)  (1984),  109(3),  235-8.  CODEN: ANALAO  ISSN: 0003-2654.  Journal  written in English.    CAN 101:16356    AN 1984:416356    CAPLUS 

Abstract

The stability of std. solns. of Mn(III) and Mn(IV) was studied and conditions for bipotentiometric detns. of Fe(II), K4[Fe(CN)6], As(III), oxalate, and hydroquinone with these oxidants were investigated.  As(III) can be detd. only in the presence of suitable catalysts.  The reversibility of redox pairs formed in the course of titrn. depends on the compn. of the soln. and the current used for the polarization of the electrodes.  The results obtained were good and reproducible. 

Indexing -- Section 79-3  (Inorganic Analytical Chemistry)   

Standard solutions 
    (of manganese, for bipotentiometric titrn.)   

123-31-9, analysis 
338-70-5, analysis 
7439-89-6, analysis 
7440-38-2, analysis 
13408-63-4 
Role: ANT (Analyte); ANST (Analytical study) 
    (detn. of, std. manganese solns. for bipotentiometric titrimetric) 

7439-95-4, uses and miscellaneous 
Role: USES (Uses) 
    (std. solns. of trivalent and tetravalent, in bipotentiometric titrns.) 

Supplementary Terms

potentiometric titrn manganese std soln; iron detn potentiometric titrn; arsenic detn potentiometric titrn; oxalate detn potentiometric titrn; hydroquinone detn potentiometric titrn; cyanoferrate detn potentiometric titrn