✦ LIBER ✦

Indicator for the titrimetric determination of calcium and total calcium plus magnesium with ethylenediaminetetraacetate in water

✍ Scribed by D.P.S. Rathore; P.K. Bhargava; Manjeet Kumar; R.K. Talra

Publisher: Elsevier Science
Year: 1993
Tongue: English
Weight: 397 KB
Volume: 281
Category: Article
ISSN: 0003-2670
DOI: 10.1016/0003-2670(93)85351-j

No coin nor oath required. For personal study only.

✦ Synopsis

The use of 2_[(4-phenylthioacetic acidJazoI-1,8-dihydroxynaphthalene-3,6-disulphonic acid as an indicator for the titrimetric determination of both calcium and total calcium plus magnesium is reported. The variables affecting the colour change at the end-point were optimized. The method is free from most metal interferences without the need for potassium cyanide and other masking agents. The method was applied to water samples and the results obtained compared favourably with those given by standard methods.

📜 SIMILAR VOLUMES

Limits of interference by iron, manganes

Limits of interference by iron, manganese, aluminium and phosphate in the EDTA determination of calcium in the presence of magnesium using Cal-red as indicator

✍ P. Moss 📂 Article 📅 1961 🏛 John Wiley and Sons 🌐 English ⚖ 386 KB

## Abstract Under the conditions described the determination of calcium in the presence of an equivalent amount of magnesium, using Cal‐red as indicator, could tolerate up to 2.0 mg. of iron, 1.0 mg. of manganese, 3 mg. of aluminium and up to 6 mg. of phosphate in 50 ml. of solution.