what effect would adding water to a urine sample have on it for suspected drink driving
It depends on the situation, it can mean that the sample was contaminated by improper cleansing technique, it can be contaminated by I.V. fluid, or it can be contaminated by tissue fluid. Most all scenarios of contamination are directly related to the skill and integrity of the one collecting the blood sample.
You can determine if a sample is more contaminated than another by comparing the levels of contaminants present in each sample. This can be done through analytical testing methods such as chemical analysis or microbiological testing. The sample with higher concentrations of contaminants is considered more contaminated than the sample with lower concentrations.
Mercury I nitrate does not contain sulfur unless the sample is contaminated.
Very high speed is the best speed to separate a soil sample in a centrifuge.
A contaminated unknown sample could potentially introduce foreign material that may interfere with the identification process. This contamination could lead to misleading results or hinder the ability to correctly identify the unknown sample. It is important to ensure the sample is pure and free from contamination for accurate identification.
It means the sample is contaminated.
It is very common for a person who is menstruating to contaminate a urine sample. Of course, contaminated urine samples are very common in general.
The experimental oxygen would be higher than the theoretical oxygen in a contaminated sample of potassium chlorate. This is because the moisture would contribute to the sample's weight when measured, resulting in a higher oxygen content calculation compared to the theoretical amount based on the chemical formula.
It is most likely not acetic acid, or the sample maybe contaminated
Water samples contaminated with excess salts can be purified through techniques such as reverse osmosis, which uses a semi-permeable membrane to separate salts from water. Another method is distillation, where water is heated to create vapor, leaving salts behind, and then condensed back into liquid form. Ion exchange is also effective, where ions in the water are exchanged with ions from a resin, effectively removing excess salts. Each method varies in efficiency and suitability depending on the specific salinity and contaminants present in the sample.
A lower and wider melting point range could indicate that the sample was contaminated with trace amounts of impurities.