Determination of crude ash in a feed sample

Total ash

             Total mineral elements as a group are determined in a sample and weighing the residue, which is called ash. Such a determination tells nothing about a specific element and the ash may include carbon from organic matter as carbonate when base-forming minerals are in access. This determination is used in the conventional feed analysis to provide a figure to arrive at the determination of nitrogen free extract (NFE) by difference. However, this ash may be used as a starting point for the determination of specific elements present in the feed sample.

Procedure

            Take 5 grams feed sample in a cleaned, dried, already weight crucible, ignite the sample in a muffle furnace at 550-650oC till white-grey ash is obtained, cool the residue in a desiccator, and record the weight.

Calculation

                                 Wt. of ash
               Ash % = ------------------- X 100
                              Wt. of sample

Comments

Post a Comment

Popular posts from this blog

Sugar •        Sugar has been described both in history and recently as a topical wound treatment. •        The basis for its use is its high osmolality. •        Thus, it is effective in reducing edema due to its hydrophilic action. •        It has also been reported to attract macrophages, accelerate slough of devitalized tissue, provide cellular energy, and promote granulation tissue. •        Its use should be discontinued after the wound has a good bed of granulation tissue. •        It has been reported to be effective against Staph., Strep., Enterobacter, E. coli, Klebsiella, Pseudomonas, and Serratia organisms. •          It reportedly does not cause hyperglycemia. •        It should be used with caution on large wounds. I...
Read more

Nematodes

Image
    General Characteristics: Nematodes are commonly called roundworms because, as the name suggests, they are round when viewed in cross section. They are cylindrical in structure and taper towards their anterior and posterior ends. They are bilaterally symmetrical. The sexes are separate in most species, a few are hermaphrodite. Nematodes that parasitize domestic animals are found in all parts of the body but are most commonly found in the digestive and respiratory tracts, and in the circulatory system.
Read more
PHYSICAL EXAM PROCESS 1)  Signalment / History 2)  General Appearance / Initial Observations 3)  Vital Signs 4)  Physical Exam (Systems Approach or Head to Toe) 5)  Surgical / Anesthetic Risk Assessment 6)  RAVS Animal Condition (RAC) Score
Read more