scholarly journals Determination of Zinc Content in Commercial Toothpaste Samples in Nigeria by Atomic Absorption Spectrophotometric Method

2021 ◽  
Vol 22 (1) ◽  
pp. 159-164
Author(s):  
James Okwudiri Ogidi
Keyword(s):  
Atomic Absorption ◽  
Spectrophotometric Method ◽  
Zinc Content ◽  
Oral Bacteria ◽  
Deionized Water ◽  
Zinc Salt ◽  
Maximum Permissible Level ◽  
Zinc Intake ◽  
Upper Limit

Zinc as its citrate or sulphate salt is added to some toothpaste as a bactericide to reduce the presence of bacteria in the mouth. These bacteria can form plaque or produce acids which cause dental decay and halitosis. Zinc salt is added at amounts which are enough to show activity against oral bacteria without causing toxicity to the user. Five commercial samples of different brands of toothpaste (TP-A, TP-B, TP-C, TP-D and TP-E) were purchased from different pharmacy stores in Ogige and Eko markets, Nigeria and analysed for the presence of zinc using atomic absorption spectrophotometric method. The samples were digested with deionized water and HNO3, centrifuged and filtered. The absorbance of the supernatants obtained was read with a spectrophotometer. Calibration curves for zinc sulphate and zinc citrate were obtained with regression (R2) values of 0.9992 and 0.9973, respectively. The equation obtained from the curves used in determining the content of zinc in the samples. The zinc content (% w/w) of samples was determined to be 0.8467%, 0.8127%, 0.0119%, 0.0188% and 0.0305%, respectively. These values were well below the maximum permissible level of zinc in toothpaste samples but were within the upper limit for daily zinc intake.

Accurate determination of calcium stearate by atomic absorption spectrophotometric method in polymer

2008 ◽  
Vol 108 (4) ◽  
pp. 2638-2643
Author(s):  
Mir Ali Farajzadeh ◽  
Mahboobe Ghorbani Ravandi ◽  
Ali Ranji ◽  
Elham Feyz
Keyword(s):  
Atomic Absorption ◽  
Spectrophotometric Method ◽  
Accurate Determination ◽  
Calcium Stearate

scholarly journals DETERMINATION OF THE METAL CONTENT IN SOME FLOURS AND PASTES OBTAINED FROM DIFFERENT WHEAT SPECIES

1970 ◽  
Vol 62 ◽  
Author(s):  
Nicoleta Diana Raba ◽  
Iosif Gherhen ◽  
Florina Furdi
Keyword(s):  
Triticum Aestivum ◽  
Atomic Absorption ◽  
Spectrophotometric Method ◽  
Triticum Durum ◽  
Metal Content ◽  
Wheat Species ◽  
Triticum Spelta ◽  
Basic Composition ◽  
Different Types

In the present paper, we followed to determine the metal content in some different types of flour obtained from different wheat species, and in several pastes that contain flour made out of the Triticum aestivum, Triticum durum si Triticum spelta wheat species in their basic composition. In order to do this we have analyzed 10 samples: 2 flours and 8 pastes harvested from random stores, belonging to different local and foreign manufacturers. In the same time, we tryed to identify the wheat species used to produce the pastes, analyzing them depending on the metal content. The determination has been realysed using the atomic absorption spectrophotometric method, the analyzed metals being: Cu, Zn, Mn, Fe, Ca, Mg, K şi Na.

Collaborative Study Using Atomic Absorption Spectrophotometry for the Determination of Copper in Alcoholic Products

1967 ◽  
Vol 50 (2) ◽  
pp. 338-339
Author(s):  
Duane H Strunk ◽  
A A Andreasen
Keyword(s):  
Atomic Absorption ◽  
Spectrophotometric Method ◽  
Collaborative Study ◽  
Atomic Absorption Spectrophotometry ◽  
Good Precision ◽  
Absorption Method ◽  
Standard Curve ◽  
Absorption Spectrophotometry ◽  
Determination Of Copper

Abstract A collaborative study was conducted on the 'atomic absorption spectrophotometric method for measuring the concentration of copper in alcoholic products. In this method, the samples are aspirated directly into the burner of the instrument, and the absorhance values are converted to ppm copper by reference to a standard curve. Data show good precision and are comparable to those obtained by the ZDBT method. It is recommended that the atomic absorption method be adopted as official, first action.

Atomic Absorption Spectrophotometric Method for Determination of Polydimethylsiloxane Residues in Pineapple Juice: Collaborative Study

1990 ◽  
Vol 73 (5) ◽  
pp. 721-723
Author(s):  
Robert D Parker
Keyword(s):  
Nitrous Oxide ◽  
Atomic Absorption ◽  
Spectrophotometric Method ◽  
Collaborative Study ◽  
Atomic Absorption Spectrophotometry ◽  
Pineapple Juice ◽  
Absorption Spectrophotometry ◽  
Relative Standard ◽  
Standard Deviations

Abstract An atomic absorption spectrophotometric method for determination of polydimethylsiloxane (PDMS) residues In pineapple juice was collaboratively studied by 9 laboratories. PDMS residues are extracted from pineapple Juice with 4- methyl-2-pentanone and the extracted silicone Is measured by atomic absorption spectrophotometry using a nitrous oxide/ acetylene flame. Collaborators analyzed 5 samples Including 1 blind duplicate. Reproducibility relative standard deviations (RSDR) were 13.1% at 31 ppm, 6.9% at 18 ppm, 14.8% at 7.9 ppm, and 16.1 % at 4.9 ppm PDMS. The method has been approved Interim official first action by AOAC.

Atomic Absorption Spectrophotometric Determination of Aluminum in Pharmaceuticals

1973 ◽  
Vol 56 (2) ◽  
pp. 358-360
Author(s):  
Pramod P Karkhanis ◽  
Jon R Anfinsen
Keyword(s):  
Atomic Absorption ◽  
Spectrophotometric Determination ◽  
Spectrophotometric Method ◽  
Pharmaceutical Preparations ◽  
Distinct Advantage ◽  
Commercial Products

Abstract A simple, sensitive, and rapid atomic absorption spectrophotometric method for aluminum in pharmaceutical preparations is described. No interference from other ingredients has been experienced in utilizing this technique. The reproducibility of the method has been reported for a lotion containing lipid base. The results of the determination of aluminum in 3 different commercial products are presented. This method, because of its simplicity and sensitivity, provides a distinct advantage over methods previously reported in the literature.

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