Potassium dichromate

About: Potassium dichromate is a research topic. Over the lifetime, 1430 publications have been published within this topic receiving 18967 citations. The topic is also known as: Potassium dichromate(VI) & Chromium potassium oxide.

Determination of aspirin in pharmaceutical preparations by spectrophotometry after oxidation with potassium dichromate

Abstract: A spectrophotometric method for the determination of aspirin in the range 0–360 µg ml–1 is proposed. The method is based on the oxidation of aspirin by potassium dichromate in 5 M sulphuric acid at 80 °C (reaction time 30 min). The chromium(III) developed is measured at 580 nm. The method is simple, highly accurate and readily applied to the determination of aspirin in pharmaceutical products. The results were statistically compared with those obtained by the official BP method.

Study on antioxidant potential of Murraya koenigii leaves in Wistar rats.

Abstract: The antioxidant activity of Murraya koenigii (L.) Spreng (Family: Rutaceae), leaves was investigated in male wistar rats. Potassium dichromate was used to induce oxidative stress. The traditional medical literature describes its potential role as a source of many vitamins, flavonoids, phenols and domestic remedy for many human disorders. The whole plant is considered to be tonic, antidiarrhoeal, febrifuge, blood purifier and as stomachic. In the present study animals were divided into four groups Group I (Control), Group II (Potassium dichromate), Group III (Murraya koenigii + Potassium dichromate) and Group IV (Murraya koenigii). in vivo antioxidant activity of Murraya koenigii inhibited the toxicity of potassium dichromate. The GSH content in liver (1.79 +/- 0.019) and kidney (1.967 +/- 0.013) of Group IV rats significantly (p < 0.05) increased whereas, hepatic malondialdehyde content in liver (2.44 +/- 0.29) and kidney (2.34 +/- 0.057) was significantly (p < 0.05) reduced as compare to control. However, Chromate significantly (p < 0.05) decreased the reduced glutathione (GSH) content and increases hepatic malondialdehyde (MDA) content in both liver and kidney as compared to control. Further post treatment with Murraya koenigii (Group III) significantly (p<0.05) increase the GSH content in liver (1.54 +/- 0.013) and kidney (1.27 +/- 0.011) as compared to Group II whereas, hepatic malondialdehyde content in liver (4.24 +/- 0.71) and kidney (3.86 +/- 0.038) was significantly (p<0.05) reduced as compare to Group II(Potassium dichromate) These results clearly indicate that Murraya koenigii leaves have significant potential as a natural antioxidant agents.

The volumetric determination of uranium after reduction by lead in dilute perchloric acid solution

Abstract: A rapid and convenient volumetric method is described for determining uranium which is suitable for high-grade ores and oxide concentrates. A dilute boiling solution of the sample in perchloric acid is reduced with granular lead and cooled under an atmosphere of carbon dioxide. After decanting the solution and adding ferric perchlorate, it is titrated with standard potassium dichromate solution. The elements found to interfere can be removed by precipitation with cupferron in the perchloric acid solution. The results obtained for uranium oxide samples by the proposed method are compared with those by a standard gravimetric method. (auth)

Determination of total carbon in soils by wet combustion

Abstract: A digestion–purification train using sulphuric–phosphoric acid and potassium dichromate and employing a gravimetric finish is described for the determination of total organic carbon in soils. Interference of volatile mineral acids, chlorine and chromyl chloride (derived from chloride present in the soil) is prevented by using a bubbler containing a solution of sodium acetate, acetic acid and potassium iodide. The results obtained for total carbon in a number of mineral soils were very similar to those obtained by the Pregl dry combustion method.