scholarly journals (162)Rapid Determination of Sulfuric Acid in Mixed Acids by means of Sodium Rhodizonate Test Paper as Indicator

1952 ◽  
Vol 55 (6) ◽  
pp. 333-335
Author(s):  
Tomoyuki Mukoyama
Keyword(s):  
Sulfuric Acid ◽  
Rapid Determination ◽  
Test Paper ◽  
Sodium Rhodizonate ◽  
Mixed Acids

Simple, Rapid Determination of Lecithin and Sphingomyelin in Amniotic Fluid

1973 ◽  
Vol 19 (12) ◽  
pp. 1394-1396 ◽  
Author(s):  
K G Blass ◽  
R J Thibert ◽  
T F Draisey
Keyword(s):  
Sulfuric Acid ◽  
Amniotic Fluid ◽  
Rapid Determination ◽  
Standard Addition ◽  
Standard Curve ◽  
Sample Application ◽  
Instant Thin Layer Chromatography ◽  
Rhodamine B Dye ◽  
Layer Chromatography

Abstract We describe a rapid and very sensitive modified determination of lecithin and sphingomyelin in amniotic fluid. It requires 1.5 ml of amniotic fluid and can be done in less than 40 min. Modifications include "Instant Thin Layer Chromatography" plates (Gelman) with a punched disc system of sample application, as well as elimination of the acetone wash steps, and substitution of Rhodamine B dye for the corrosive sulfuric acid char technique of detection. The procedure can be quantified, and exact concentrations of lecithin in amniotic fluid can be determined by a standard addition procedure, or from a standard curve.

The Use of Raney Nickel in the Rapid Determination of Small Concentrations of Nitric Acid in Sulfuric Acid.

1963 ◽  
Vol 35 (8) ◽  
pp. 1090-1090 ◽  
Author(s):  
Charles. Wankat ◽  
D. A. Keyworth ◽  
V. A. Brand
Keyword(s):  
Sulfuric Acid ◽  
Nitric Acid ◽  
Raney Nickel ◽  
Rapid Determination

scholarly journals Rapid determination of amount of nickel plating by using high sensitive nickel ion test paper

1972 ◽  
Vol 21 (8) ◽  
pp. 1098-1100
Author(s):  
Toshihiko HATA ◽  
Yoshihisa KONO ◽  
Kiyoshi SUMI
Keyword(s):  
Rapid Determination ◽  
Test Paper ◽  
Nickel Plating ◽  
Nickel Ion

Determination of Polydextrose (Polymer) and Residual Monomers in Polydextrose by Liquid Chromatography

1991 ◽  
Vol 74 (3) ◽  
pp. 571-574
Author(s):  
John W Thomas ◽  
Donna L Brown ◽  
Daniel J Hoch ◽  
John J Leary ◽  
Jarmila Dokladalova
Keyword(s):  
Sulfuric Acid ◽  
Rapid Determination ◽  
Water Soluble ◽  
Simple Liquid ◽  
Good Precision ◽  
Response Curves ◽  
Cation Exchange Column ◽  
Trimethylsilyl Derivatives ◽  
Liquid Chromatographic

Abstract A simple, liquid chromatographic method has been developed for determination of the reduced-calorie food additive polydextrose—a water soluble, 1 kilocalorie/gram bulking agent used extensively for manufacture of low-calorie food products. The method allows rapid determination of polydextrose content as well as determination of the minor components: dextrose, sorbitol, and 2 isomeric anhydroglucoses in bulk samples of polydextrose. The proposed method is superior to current Food Chemical Codex (FCC) methodologies for determination of polydextrose (phenol sulfuric acid spectrophotometry) and for determination of residual monomers [gas chromatographic (GC) determination as their trimethylsilyl derivatives]. The proposed method is more precise, considerably faster, and is safer to execute. The method uses a resin-based cation exchange column, 0.001N sulfuric acid mobile phase, and differential refractive index detection. Analyte response curves were linear; and data displayed good precision with coefficients of variation ranging from 1.1 to 1.6%. The efficiency, specificity, precision, and ruggedness of the method make it amenable to implementation in a routine quality control operation.

scholarly journals The first result in the determination of the percentage concentration of sulfuric acid solution based on the gamma transmission technique with an energy of 662 ke

2021 ◽  
Vol 5 (2) ◽  
pp. first
Author(s):  
Chuong Dinh Huynh ◽  
Sang Thanh Truong ◽  
Trang Thi Ngoc Le ◽  
Linh Thi Truc Nguyen ◽  
Tam Duc Hoang
Keyword(s):  
Sulfuric Acid ◽  
Acid Solution ◽  
Sulfuric Acid Solution ◽  
Calibration Curve ◽  
Rapid Determination ◽  
Simulated Data ◽  
Transmission Technique ◽  
Different Temperatures ◽  
Percentage Concentration

In this study, we propose an approach using the gamma transmission technique based on the combination of the experimental and simulated data for determining the percentage concentration of the acid solution. The experiment consists of a collimated 137Cs radioactive source emitting a narrow gamma beam of 662 keV and a NaI(Tl) detector. Monte Carlo simulation data is used to construct the calibration curve of lnR versus the percentage concentration of acid solution at different temperatures (R is the ratio of the area under a transmission peak for an acid solution relative to that for water). The percentage concentration of the acid solution is determined based on the calibration curve and the experimental ratio R. The obtained results showed that this approach was feasible in which the percent concentration of 7 in total 8 samples of the sulfuric acid solution are less than 5% in comparison with one of the reference samples. There is only one sample with a relative deviation of 7.6%. These preliminary results suggest that it is possible to develop nondestructive testing for the rapid determination of the percentage concentration of acid solutions based on the gamma transmission technique.

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