XX CONTENTS 



Chemical Techniques (continued) 



Ascorbic Acid 245 



Lowry, Lopez, and Bessey Method for Ascorbic Acid 245 



Glycogen 247 



Boettiger Method for Glycogen 248 



Van Wagtendonk, Simonsen, and Hackett Method for 



Glycogen 249 



Vitamin A and Carotene 250 



Method of Bessey et al. for Vitamin A and Carotene 250 



III. Titrimetric Techniques 255 



A. Microhter Burettes 255 



B. Photometric End Points 265 



C. Methods 265 



Sodium and Potassium (Combined) 265 



Linderstr0m-Lang Method for Sodium and Potassium 266 



Potassium 268 



Norberg Method for Potassium 268 



Sodium 270 



Lindner and Kirk Method for Sodium 271 



Calcium 272 



Siwe lodometric Permanganate Method for Calcium 273 



Siwe Acidimetric Method for Calcium 274 



Lindner and Kirk Cerimetric Method for Calcium 275 



Iron 276 



Kirk and Bentley Method for Iron 277 



Ramsay Method for Iron 278 



Phosphorus 280 



Chloride 281 



Linderstr0m-Lang, Palmer, and Holter Electrometric 



Method for Chloride 282 



Nitrogen and Ammonia 283 



Brliel, Holter, Linderstr0m-Lang, and Rozits Method for 



Nitrogen and Ammonia 283 



Urea 286 



Kinsey and Robison Method for Urea 286 



Urease 287 



Amide, Peptide, and Nitrate Nitrogen 288 



Borsook and Dubnoff Methods for Amide, Peptide, and 



Nitrate Nitrogen 288 



Acid, Alkah, Amino, and Carboxyl Groups 290 



Lipid 291 



Schmidt-Nielsen Method for Lipid 291 



Extraction and Fractionation of Lipids 292 



Schmidt-Nielsen Method for Extraction and Fractionation 



of Lipids 293 



Iodine Number of Lipids 294 



Schmidt-Nielsen Method for Iodine Number 295 



Reducing Sugars 296 



Holter and Doyle Modification of Linderstr0m-Lang and 

 Holter lodometric Method for Reducing Sugars 296 



Heck, Brown, and Kirk Cerimetric Method for Reducing 



Sugars 297 



Glycogen 298 



Heatley Method for Total Glycogen 299 



Heatley and Lindahl Method for Desmo- and Lyoglycogen 300 

 Ascorbic Acid 300 



GHck Method for Ascorbic Acid 301 



