Table 2.

Percentages^a of hemoglobins A and S lost from dried-blood spots stored at 37 °C in low-humidity and high-humidity environments^b.

Hemoglobin	Study length	Loss during storage at high humidity	Loss during storage at low humidity	Approximate loss attributable to effects of high humidity
	(days)	(%)c	(%)	(%)d
A	31 + 1	>99	36	64
S	31 + 1	>99	33	67

^aPercentages shown were derived from geometric means of triplicate determinations.

^bLow relative humidity < 30%; high relative humidity > 50%.

^cApproximate loss. Amount remaining was less than 1% of total peak area of the HPLC chromatogram.

^dDerived by subtracting loss during storage at low humidity from loss during storage at high humidity.