Container cap to test volatile organic compounds

1. An apparatus comprising:

a cap configured to at least partially seal a container, the cap comprising a venting aperture;

a plunger mechanism configured to form a passageway for air to flow from the container into a detection area, wherein the plunger mechanism includes a first aperture, a purging aperture, and a selector;

a sleeve positioned circumferentially around the plunger mechanism, wherein the sleeve includes a second aperture that aligns with the first aperture to form the passageway when the selector is in a first position, wherein the purging aperture is unaligned with the venting aperture when the selector is in the first position, and wherein, when the selector is in the second position, the second aperture is unaligned with the first aperture and the purging aperture is aligned with the venting aperture;

a sensor attached to the cap and positioned proximate the detection area, the sensor configured to detect data relating to a volatile organic compound (VOC) and to generate a signal; and

a processor configured to receive the signal and to determine a result relating to the VOC.

2. The apparatus of claim 1 , wherein the sensor is a polymer sensor circuit embedded within the cap.

3. The apparatus of claim 1 , wherein the sensor is one of an array of sensors configured to sample air from a head space.

4. The apparatus of claim 1 , wherein the VOC data is sensed while avoiding direct contact with a fluid producing the VOC.

5. The apparatus of claim 1 , further comprising a power circuit configured to provide power to the processor and sensor.

6. The apparatus of claim 1 , wherein the sensor is exposed to the VOC for a time period determined according to a material being sampled.

7. The apparatus of claim 1 , wherein the sensor is exposed to a response time of the sensor.

8. The apparatus of claim 1 , further comprising a display configured to display the result.

9. The apparatus of claim 1 , wherein the cap is further configured to vent a head space.

10. The apparatus of claim 1 , further comprising a puncture seal positioned between the plunger and the container.

11. The apparatus of claim 1 , wherein the selector is configured to rotate to transition from the first position to the second position.

12. The apparatus of claim 1 , wherein the container remains sealed after the plunger mechanism is depressed.

13. An apparatus comprising:

a cap configured to at least partially seal a container, the cap comprising a venting aperture;

a plunger mechanism configured to form a passageway for air to flow from the container into a detection area, wherein the plunger mechanism includes a first aperture, a purging aperture, and a selector;

a sleeve positioned circumferentially around the plunger mechanism, wherein the sleeve includes a second aperture that aligns with the first aperture to form the passageway when the selector is in a first position, wherein the purging aperture is unaligned with the venting aperture when the selector is in the first position, and wherein, when the selector is in a second position, the second aperture is unaligned with the first aperture and the purging aperture is aligned with the venting aperture;

a sensor positioned proximate the detection area, the sensor configured to detect data relating to a volatile organic compound (VOC).

14. The apparatus of claim 13 , wherein the sensor is a polymer sensor circuit embedded within the cap.

15. The apparatus of claim 13 , wherein the VOC data is sensed while avoiding direct contact with a fluid producing the VOC.

16. The apparatus of claim 13 , further comprising a power circuit configured to provide power to the sensor.