A modern, accurate, simple and sensitive spectrophotometric procedure is tested for the appreciation of metoclopramide medicine as perspicuous form, as well as in various kinds of pharmaceutical dosages. The procedure depends on the interaction of metoclopramide (MCP) medicine and orcinol reagent by utilizing azo coupling reaction. The orcinol in NaOH solution middle to give a latterly ligand which reacts with copper (II) to output the complex with strong yellow color at 50°C. The resulting complex is water soluble, stable and can be determined spectrophotometrically at wavelength 459 nm. The calibration curve absorbance vs. concentration was established in the concentration range 0.6-12 ppm, and the curve followed the Beer’s law in this range. The procedure precision is given by the average recovery of 99.91% sequentially, as well as by the average relative standard deviation 0.70%, related to the amount of drug. The sensitivity is established at molar absorptivity 1.9044×104 l‧cm-1‧mol-1. The Sandell sensitivity is tested as 0.002 μg/cm2. The analytical results for the tested procedure agree with the official procedure. The interferences from medicine additives were tested. The established procedure is successfully examined on the appreciation of MCP in diverse kinds of pharmaceuticals.

In this work the use of a mobile phone as a spectrophotometer using camera resolution by installing the software (application store AAP) on the phone (i Phone 6), which analyzes the colour images (RGB) in results with a colour length where it was possible to calculate the colour value of each image representing a specific concentration of the solution under study. A calibration curve with a range of (1 × 10-3 - 6.25 × 10-4) mmole.L-1 using optical image analysis with the concentration of the preparation of potassium permanganate (KMnO4). A calibration curve for statistical correlation range of 0.993 (R2) was found.

The method was published for determining microgram quantities of benzene 1,3,5-triol (phloroglucinol) in aqueous solution and some bulk samples using an easy, quick, and effective spectrophotometric method. The method uses a diazotization as well as coupling process in basic medium to produce a bright yellow water-soluble dye from Phloroglucinol and diazotized 4-Methoxy aniline That is stable and also has a maximum absorption wavelength of 420 nm. With a molar absorptivity of 1.5989x 104l mol-1 cm-1 as well as index of Sand ell sensitivity 0.001 g.cm- 2, Beer's law is followed across a concentration range of (2-40) g.ml-1 of phloroglucinol.The ideal conditions for all color development are detailed, and even the suggested procedures for determining phloroglucinol in aqueous medium as well as some bulk sample  have been successfully employed.

Establishing and adopting a quick, easy, and cheap method for determining antibiotic Cefadroxil monohydrate (CFL) in its pure form and pharmaceutical preparations. The method involves adopting spectrophotometry in the visible region. The method adopted the oxidation of the studied medicine by an excess amount of N-Bromo succinamide (NBS), then estimated the NBS Excess by bleaching the dye color of Methylene Blue. The maximum wavelength was measured at λ 586 nm. This approach obeys the Beer-Lambert law for the range (5-20 µg. ml -1 ), with a correlation coefficient of 0.9980. The calculated molar absorptivity was 1.41× 10 3 (L. mol -1 . cm -1 ), and Sandall's sensitivity was 0.27 µg. cm -2 . The limit of detection (LOD) was 3.508 µg. ml -1 , as well as the limit of quantification (LOQ), was 11.693 µg. ml -1 . The precision and accuracy of the method are established and checked.This study measured the optimal reaction conditions and other analytical variables. It showed decent repeatability, and the relative standard deviation (RSD percentage) was less than 1%.The proposed methodology identified the effective implementation of an easy, resilient as well as precise spectrophotometric method to determine Cefadroxil employing N-Bromo succinimide as Cefadroxil oxidant factor and also the unreacted N-Bromo succinimide bleached the methylene blue dye. The process has been successfully extended in different pharmaceutical formulations to evaluate the Cefadroxil drug.

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