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26 METHODS FOR THE ANALYSIS OF URINE
TABLE I
No. NaH2P04 Na2HP04 Pa+ Indicator
1 0.1000N 9.27]
2 0.0001N 0.0480N 8.7 Phenolphthalein
3 0.0001N 0.0120N 8.0 J 1 Neutral red
4 0.0166N 0.0833N 7.48
5 0.0010N 0.0060N 7.38
6 0.0010N 0.0023N 6.90
CHaCOOH CHiCOOlSla
7 0.0009N 0.0920N 6.70]
8 0.0023N 0.0920N 6.30 . Sodium alizarine
9 0.0046N 0.0920N 6.00 sulphonate
10 0.0092N 0.0920N 5.70 p-Nitrophenol
11 0.0230N 0.0920N 5.30
12 0.0460N 0.0920N 4.90 Methyl red
13 0.0920N 0.0920N 4.70. -
TABLE II
Log. + H Log. •4-H
4.6 250X10-' 6.4 4.0 X10~7
4.8 160X10~7 6.6 2.5 X10~7
5.0 100X10"7 6.8 1.6 X10-7
5.2 63X10-"7 7.0 1.0 X10~7
5.4 40X10~7 7.2 0.63X10""7
5.6 25X10"7 7.4 0.40X10"7
5.8 16X10-7 7.6 0.25X10-7
6.0 10XKT7 7.8 0.16X10~7
6.2 6.3X10~7 8.0 0.10X10~7
Procedure.—Select thirteen large tesfr-tubes of good glass and ^distinguishable in color and form. Into each of ten of these introduce 10 c.c. of the various standard solutions. Make up to 60 c.c. with distilled water and add to each exactly the same amount of an aqueous solution of sodium alizarine sulphonate (10 to 15 drops). Mix well by inverting. Introduce 10 c.c. of the urine to be tested into a similar test-tube, dilute and add indicator in exactly the same way as before. Match the color of the diluted