Determination of trace manganese in high-purity titanium, silicon and mineral acids by a flow-injection method based on a catalytic reaction

1989 ◽  
Vol 217 ◽  
pp. 23-30 ◽  
Author(s):  
Chongliang Zhang ◽  
Susumu Kawakubo ◽  
Tsutomu Fukasawa
Keyword(s):  
Flow Injection ◽  
Catalytic Reaction ◽  
High Purity ◽  
Injection Method ◽  
Mineral Acids ◽  
Titanium Silicon ◽  
Purity Titanium

scholarly journals Sequential determination of chromium(VI) and chromium(III) by potentiometric flow-injection method.

2000 ◽  
Vol 49 (1) ◽  
pp. 59-64 ◽  
Author(s):  
Hiroki OHURA ◽  
Toshihiko IMATO ◽  
Ikuo MATSUO ◽  
Sumio YAMASAKI
Keyword(s):  
Flow Injection ◽  
Injection Method ◽  
Sequential Determination ◽  
Chromium Vi

scholarly journals Determination of magnesium and calcium in high purity titanium slag

1959 ◽  
Vol 8 (4) ◽  
pp. 225-231
Author(s):  
Katsuhiko NAKA ◽  
Hiromoto IWAMATSU
Keyword(s):  
High Purity ◽  
Titanium Slag ◽  
Purity Titanium

scholarly journals Spectrophotometric flow injection procedure to indirect determination of paracetamol in pharmaceutical formulations using o-tolidine as reagent

2018 ◽  
Vol 33 (2) ◽  
pp. 47
Author(s):  
Orlando Fatibello-Filho ◽  
Heberth Juliano Vieira
Keyword(s):  
Standard Deviation ◽  
Detection Limit ◽  
Flow Injection ◽  
Pharmaceutical Formulations ◽  
Injection Method ◽  
Indirect Determination ◽  
Analytical Curve ◽  
Relative Standard ◽  
Injection Procedure

A spectrophotometric flow injection method for the determination of paracetamol in pharmaceutical formulations is proposed. The procedure was based on the oxidation of paracetamol by sodium hypochloride and the determination of the excess of this oxidant using o-tolidine dichloride as chromogenic reagent at 430 nm. The analytical curve was linear in the paracetamol concentration range from 8.50 x 10-6 to 2.51 x 10-4 mol L-1 with a detection limit of 5.0 x 10-6 mol L-1. The relative standard deviation was smaller than 1.2% for 1.20 x 10-4 mol L-1 paracetamol solution (n = 10). The results obtained for paracetamol in pharmaceutical formulations using the proposed flow injection method and those obtained using a USP Pharmacopoeia method are in agreement at the 95% confidence level.

scholarly journals Determination of trace metals in high-purity titanium by ICP-AES after coprecipitation separation.

1990 ◽  
Vol 39 (12) ◽  
pp. 829-833 ◽  
Author(s):  
Hiroyasu YOSHIKAWA ◽  
Youichi ISHIBASHI ◽  
Naoki GUNJI ◽  
Takeshi MISUMI
Keyword(s):  
Trace Metals ◽  
High Purity ◽  
Purity Titanium

scholarly journals Spectrophotometric determination of peroxydisulphate with o-dianisidine by flow injection

1990 ◽  
Vol 68 (10) ◽  
pp. 1750-1756 ◽  
Author(s):  
Paul M. Shiundu ◽  
Adrian P. Wade ◽  
S. B. Jonnalagadda
Keyword(s):  
Spectrophotometric Determination ◽  
Flow Injection ◽  
Spectrophotometric Method ◽  
Ion Concentration ◽  
Injection Method ◽  
Absorbance Maximum ◽  
Accurate Knowledge ◽  
Stable Product

Precise and accurate knowledge of peroxydisulfate ion concentration is critical in industrial polymer production, where it is extensively used as an activator. Its ability to oxidize in either acidic, neutral, or alkali media also makes it widely applicable in many other areas of chemistry.In this paper we present an optimized spectrophotometric flow injection method for determination of peroxydisulfate. The analyte oxidizes o-dianisidine to form a stable product which has a convenient absorbance maximum at 450 nm. This provides a simple and sensitive alternative to present methods which are more costly, tedious, or complex. Keywords: spectrophotometric method, peroxydisulphate.

scholarly journals Determination of tetracycline in plasma by flow injection method with chemiluminescence detection.

1984 ◽  
Vol 33 (10) ◽  
pp. 568-570 ◽  
Author(s):  
Takuji OWA ◽  
Tsutomu MASUJIMA ◽  
Hisanobu YOSHIDA ◽  
Hideo IMAI
Keyword(s):  
Flow Injection ◽  
Chemiluminescence Detection ◽  
Injection Method
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