How do you test for heavy metals in fish?
The levels of heavy metals were determined by using an atomic absorption spectrophotometer (AAS). The results showed that concentrations of heavy metals in the sampled fishes exceeded the acceptable levels for food sources for human consumption.
How do you identify heavy metals in water samples?
What tests for metals in water are there?
- Atomic Absorption spectrometry (AA) – single element analysis by flame or graphite furnace.
- Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES) – allows for simultaneous, sequential analysis of multiple elements.
Which instrument is used for estimation of heavy metals from water samples?
Inductively coupled plasma mass spectrometry (ICP-MS) is the best for the estimation of heavy metals but if not available atomic absorption could also be used as recommended by many researchers above.
How do you Analyse heavy metals?
Determination of heavy metals is done using Atomic Absorption-(AAS), Inductively Coupled Plasma Optical Emission-(ICP-OES) and Inductively Coupled Plasma Mass Spectrometry (ICP-MS).
Where do heavy metals accumulate in fish?
Fish have the ability to accumulate heavy metals in their tissues by absorption along gill surface and kidney, liver and gut tract wall to higher levels than environmental concentration .
What heavy metals are in fish?
Heavy metals (Cd, Hg, and Pb) were detected in almost all analyzed fish and seafood samples, with the highest concentrations recorded for Hg. The highest HI close to 1 were found for fresh bluefin tuna and canned mackerel, mostly due to Hg.
How do you find the concentration of heavy metals in water?
The levels of heavy metals were determined by atomic absorption spectroscopy method. Results showed that range of Pb, Cd, Cr and Zn in the water samples were 80-123, 61-97, 63-87 and 82-120 ppb, respectively; and their ranges in the sediment samples were 479-1072, 98-293, 102-622 and 937-1577 ppb, respectively.
What are some practical applications in which the test for heavy metals can be used?
Heavy metals are commonly used in industrial applications such as in the manufacture of pesticides, batteries, alloys, electroplated metal parts, textile dyes, steel, and so forth.
Which instrument is used for heavy metal detection?
Atomic spectrometry instruments are the most popular instruments used for trace metal analysis.
What is the common analytical procedure that can be used to distinguish different metal ions?
The composition of relatively complex mixtures of metal ions can be determined using qualitative analysis, a procedure for discovering the identity of metal ions present in the mixture (rather than quantitative information about their amounts).
Which fish have the most heavy metals?
Overall, larger and longer-lived fish tend to contain the most mercury ( 4 ). These include shark, swordfish, fresh tuna, marlin, king mackerel, tilefish from the Gulf of Mexico, and northern pike ( 5 ). Larger fish tend to eat many smaller fish, which contain small amounts of mercury.
How do heavy metals affect fish?
These heavy metals accumulate in different organs of the fish, causing mortality. This effect first appears in blood and affects the fish by alteration of blood components making the fish weak, anemic and vulnerable to diseases. Heavy metals pollution is thus targeting the major protein source in the form of fish.