Nitrate test to 2.5 micrograms and a concentration of 1 in 25,000 parts. Devarda's alloy (Copper/Aluminium/Zinc) is a reducing agent. When reacted with nitrate in sodium hydroxide solution, ammonia is liberated. The ammonia formed may be detected by its characteristic odor, and by damp red litmus paper's turning blue, signalling that it is an alkali — very few gases other than ammonia evolved from wet chemistry are alkaline. Aluminium is the reducing agent in this reaction that will occur. Diphenylamine may be used as a wet chemical test for the presence of the nitrate ion. In this test, a solution of diphenylamine
Test of Adolescent and Adult Language Test of Adolescent and Adult Language The Test of Adolescent and Adult Language: Third Edition (TOAL-3) is a standardized, norm-referenced assessment of receptive, written and expressive language. The TOAL-3 was published in 1994. The test used to help identify individuals who may have a language disorder, and to help determine in what area(s) the dysfunction lies. Though the test is commonly administered by a Speech and Language Pathologist (SLP), it can also be administered by anyone who has some training or practice administering language or psychology type tests, and has familiarized him/herself with the test and scoring procedures. The TOAL-3