(A) = Milligrams of copper.
(B) = Milligrams of invert sugar.
(A) (B) (A) (B) (A) (B) (A) (B)
90 46.9 133 69.7 176 93.0 219 117.0
91 47.4 134 70.3 177 93.5 220 117.5
92 47.9 135 70.8 178 94.1 221 118.1
93 48.4 136 71.3 179 94.6 222 118.7
94 48.9 137 71.9 180 95.2 223 119.2
95 49.5 138 72.4 181 95.7 224 119.8
96 50.0 139 72.9 182 96.2 225 120.4
97 50.5 140 73.5 183 96.8 226 120.9
98 51.1 141 74.0 184 97.3 227 121.5
99 51.6 142 74.5 185 97.8 228 122.1
100 52.1 143 75.1 186 98.4 229 122.6
101 52.7 144 75.6 187 99.0 230 123.2
102 53.2 145 76.1 188 99.5 231 123.8
103 53.7 146 76.7 189 100.1 232 124.3
104 54.3 147 77.2 190 100.6 233 124.9
105 54.8 148 77.8 191 101.2 234 125.5
106 55.3 149 78.3 192 101.7 235 126.0
107 55.9 150 78.9 193 102.3 236 126.6
108 56.4 151 79.4 194 102.9 237 127.2
109 56.9 152 80.0 195 103.4 238 127.8
110 57.5 153 80.5 196 104.0 239 128.3
111 58.0 154 81.0 197 104.6 240 128.9
112 58.5 155 81.6 198 105.1 241 129.5
113 59.1 156 82.1 199 105.7 242 130.0
114 59.6 157 82.7 200 106.3 243 130.6
115 60.1 158 83.2 201 106.8 244 131.2
116 60.7 159 83.8 202 107.4 245 131.8
117 61.2 160 84.3 203 107.9 246 132.3
118 61.7 161 84.8 204 108.5 247 132.9
119 62.3 162 85.4 205 109.1 248 133.5
120 62.8 163 85.9 206 109.6 249 134.1
121 63.3 164 86.5 207 110.2 250 134.6
122 63.9 165 87.0 208 110.8 251 135.2
123 64.4 166 87.6 209 111.3 252 135.8
124 64.9 167 88.1 210 111.9 253 136.3
125 65.5 168 88.6 211 112.5 254 136.9
126 66.0 169 89.2 212 113.0 255 137.5
127 66.5 170 89.7 213 113.6 256 138.1
128 67.1 171 90.3 214 114.2 257 138.6
129 67.6 172 90.8 215 114.7 258 139.2
130 68.1 173 91.4 216 115.3 259 139.8
131 68.7 174 91.9 217 115.8 260 140.4
132 69.2 175 92.4 218 116.4 261 140.9
(A) (B) (A) (B) (A) (B) (A) (B)
262 141.5 305 166.8 348 192.6 391 219.3
263 142.1 306 167.3 349 193.2 392 219.9
264 142.7 307 167.9 350 193.8 393 220.5
265 143.2 308 168.5 351 194.4 394 221.2
266 143.8 309 169.1 352 195.0 395 221.8
267 144.4 310 169.7 353 195.6 396 222.4
268 144.9 311 170.3 354 196.2 397 223.1
269 145.5 312 170.9 355 196.8 398 223.7
270 146.1 313 171.5 356 197.4 399 224.3
271 146.7 314 172.1 357 198.0 400 224.9
272 147.2 315 172.7 358 198.6 401 225.7
273 147.8 316 173.3 359 199.2 402 226.4
274 148.4 317 173.9 360 199.8 403 227.1
275 149.0 318 174.5 361 200.4 404 227.8
276 149.5 319 175.1 362 201.1 405 228.6
277 150.1 320 175.6 363 201.7 406 229.3
278 150.7 321 176.2 364 202.3 407 230.0
279 151.3 322 176.8 365 203.0 408 230.7
280 151.9 323 177.4 366 203.6 409 231.4
281 152.5 324 178.0 367 204.2 410 232.1
282 153.1 325 178.6 368 204.8 411 232.8
283 153.7 326 179.2 369 205.5 412 233.5
284 154.3 327 178.8 370 206.1 413 234.3
285 154.9 328 180.4 371 206.7 414 235.0
286 155.5 329 181.0 372 207.3 415 235.7
287 156.1 330 181.6 373 208.0 416 236.4
288 156.7 331 182.2 374 208.6 417 237.1
289 157.2 332 182.8 375 209.2 418 237.8
290 157.8 333 183.5 376 209.9 419 238.5
291 158.4 334 184.1 377 210.5 420 239.2
292 159.0 335 184.7 378 211.1 421 239.9
293 159.6 336 185.4 379 211.7 422 240.6
294 160.2 337 186.0 380 212.4 423 241.3
295 160.8 338 186.6 381 213.0 424 242.0
296 161.4 339 187.2 382 213.6 425 242.7
297 162.0 340 187.8 383 214.3 426 243.4
298 162.6 341 188.4 384 214.9 427 244.1
299 163.2 342 189.0 385 215.5 428 244.9
300 163.8 343 189.6 386 216.1 429 245.6
301 164.4 344 190.2 387 216.8 430 246.3
302 165.0 345 190.8 388 217.4
303 165.6 346 191.4 389 218.0
304 166.2 347 192.0 390 218.7
=142. Table for the Determination of Invert Sugar (Reducing Sugars)
in the Presence of Sucrose.=—The method adopted by the Association of
Official Agricultural Chemists is essentially that proposed by Meissl
and Hiller.[108] Prepare a solution of the material to be examined in
such a manner that it contains twenty grams of the mixed sugars in
one hundred cubic centimeters, after clarification and the removal of
the excess of lead. Prepare a series of solutions in large test tubes
by adding one, two, three, four, five etc. cubic centimeters of this
solution to each tube successively. Add five cubic centimeters of the
mixed copper reagent to each, heat to boiling, boil two minutes and
filter. Note the volume of sugar solution which gives the filtrate
lightest in tint, but still distinctly blue. Place twenty times this
volume of the sugar solution in a 100 cubic centimeter flask, dilute to
the mark, and mix well. Use fifty cubic centimeters of the solution for
the determination, which is conducted as already described, until the
weight of copper is obtained. For the calculation of the results use
the following formulas and table of factors of Meissl and Hiller:[109]
Let Cu = the weight of the copper obtained;
P = the polarization of the sample;
W = the weight of the sample in the fifty cubic
centimeters of the solution used for determination;
F = the factor obtained from the table for conversion
of copper to invert sugar;
Cu
---- = approximate absolute weight of invert sugar = Z;
2
100
Z × ----- = approximate per cent of invert sugar = _y_;
W
100P
------- = R, relative number for sucrose;
P + _y_