PHOTOMETRIC DETERMINATION OF POTASSIUM IN BIOLOGICAL MATERIALS
نویسندگان
چکیده
منابع مشابه
A Volumetric Method for Determination of Potassium in Biological Materials
During the past 3 years we have carried out analyses of tissues for potassium in this laboratory using the separation by chloroplatinic acid. For 1 year potassium has been estimated by a Volhard titration of the chlorine in KzPtC16 separated by the usual procedure. Because the method seems more accurate and convenient than previous titrimetric methods, a description is warranted. SolulionsSolut...
متن کاملSemimicro determination of cellulose in biological materials.
The quantitative determination of cellulose in biological materials presents some difficult problems. The moisture con~ent of cellulose varies with the relative humidity, so that accurate analyses require that moisture determinations be made under carefully standardized conditions. Cellulose ordinarily occurs in association with lignin, polyuronide hemicelluloses, and xylan cellulosans. Matrone...
متن کاملThe Determination of Zinc in Biological Materials*
The occurrence of zinc in biological materials is no longer a matter of conjecture. The presence of zinc in all plants and lower animals so far studied, as well as its occurrence not only in the whole body of the higher animals but in the individual tissues such as liver, kidney, muscle, etc., has been established beyond doubt. In 1926, Lutz (1) reviewed very completely our knowledge concerning...
متن کاملThe Determination of Copper in Biological Materials.*
Many early workers detected copper in certain plants, but attached no significance to its occurrence. Bucholz (1) and Meissner (2) in 1816 were probably the first definitely to establish the presence of copper in plant life. Sarzeau (3), in 1830, found copper in numerous plants, and since then many workers have reported the occurrence of this element, but most of them, as reviewed by Chevreul (...
متن کاملThe Determination of Iron in Biological Materials
In an attempt to find a method for the determination of iron that could be used for the clinical study of iron metabolism, certain calorimetric procedures (1, 2) were studied. Some difficulties were encountered with these techniques and especially in their adaptation to the measurement of minute amounts of iron in such diverse materials as blood, food, feces, and urine. This led to the investig...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1945
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(18)51073-5