Brown ring test
The test is carried out with freshly prepared iron (ii) salt which is acidified with dilute tetraxosulphate (vi) acid and then mixed with trioxonitrate, to form a brown ring at the junction of the acid and aqueous layers.
search-in-place domain was triggered too early. This is usually an indicator for some code in the plugin or theme running too early. Translations should be loaded at the init action or later. Please see Debugging in WordPress for more information. (This message was added in version 6.7.0.) in /usr/www/users/mywaecf/KEYPOINT/wp-includes/functions.php on line 6121The test is carried out with freshly prepared iron (ii) salt which is acidified with dilute tetraxosulphate (vi) acid and then mixed with trioxonitrate, to form a brown ring at the junction of the acid and aqueous layers.