Toxicology & biological monitoring
Biological monitoring for 27 toxic agents used in Indian industry: when to suspect exposure, the diagnostic test and its interpretation bands, the ACGIH-BEI basis, sample collection and where the test can be done in India.
Statutory basis. Factories Act 1948 sets only AIR limits (Second Schedule TWA/STEL, s.41F) and mandates the hazardous-process exam (s.41C, ≤12-monthly); it gives NO blood/urine values. The ranges below are ACGIH BEI / OSHA / clinical benchmarks (India has not adopted biological limits into law).
Agents
- Lithium — Serum Lithium
- Lead (inorganic) — Blood lead level (BLL)
- Mercury — Urinary mercury (inorganic/elemental) · Blood mercury (organic)
- Arsenic (inorganic) — Urinary inorganic As + methylated metabolites (speciated)
- Cadmium — Cadmium — blood (CdB) & urine (CdU); β2-microglobulin (renal)
- Chromium (VI) — Total chromium in urine
- Manganese — Manganese in whole blood
- Benzene — Urine S-phenylmercapturic acid (S-PMA) · t,t-muconic acid (t,t-MA)
- Toluene — Urine toluene / o-cresol; blood toluene (alternate)
- Xylene — Urine methylhippuric acids (o-, m-, p-)
- Trichloroethylene (TCE) — Urine trichloroacetic acid (TCA); blood free trichloroethanol
- Organophosphate / carbamate pesticides — Cholinesterase — RBC acetyl- (AChE) & plasma butyryl- (BuChE)
- Fluoride (HF / fluoride dust) — Urinary fluoride
- Carbon disulphide (CS₂) — Urinary TTCA
- Carbon monoxide (CO) — Carboxyhaemoglobin (COHb) · end-exhaled CO
- Phenol — Urinary phenol (total)
- Styrene — Urinary mandelic + phenylglyoxylic acid (MA + PGA)
- n-Hexane — Urinary 2,5-hexanedione (free)
- Nickel — Urinary nickel
- Cobalt — Urinary cobalt
- PAH (coke-oven / coal-tar) — Urinary 1-hydroxypyrene (1-OHP)
- Dimethylformamide (DMF) — Urinary N-methylformamide (total NMF)
- Methanol — Urinary methanol
- Tetrachloroethylene (perc / PCE) — Blood PCE · urinary TCA
- Ethylbenzene — Urinary mandelic + phenylglyoxylic acid
- Aniline / nitrobenzene (methaemoglobin) — Blood methaemoglobin · urinary p-aminophenol
- Pentachlorophenol (PCP) — Urinary / plasma pentachlorophenol
Where to get it done (India)
- ICMR-NIOH, Ahmedabad (Govt institute) — Whole-blood heavy metals by ICP-MS; reference lab for occupational biomonitoring (ROHCs at Bengaluru & Kolkata).
- DGFASLI — Central Labour Institute, Mumbai (+ RLIs) (Govt institute) — National Referral Diagnostic Centre for occupational disease; biological & environmental monitoring.
- AIIMS New Delhi — Toxicology Lab (Govt hospital) — As / Pb / Hg / Cd / Cu / Zn / Tl in blood & urine; pesticides and poisons.
- Metropolis Healthcare (Private) — Blood lead (ICP-MS); Heavy & Trace Metals Profile (10–11 analytes); urine metal tests; serum lithium. Pan-India + home collection.
- Agilus Diagnostics (formerly SRL) (Private) — Heavy & Trace Metal Comprehensive Profile (11 metals); blood lead; serum lithium + renal panel. Pan-India.
- Dr Lal PathLabs (Private) — Heavy Metal Screen (Cd/Cr/Hg urine + blood Pb); 24-h urine lead; serum lithium. Pan-India + home collection.
- Thyrocare (Private) — Elements 22 (toxic + nutrient) on blood/urine; serum lithium. 2000+ cities + home collection.
- Vimta Labs (Hyderabad) / Neuberg (Private) — Pb / As / Cd / Hg + trace-metal panels; industry biomonitoring (battery, paint, glass, e-waste).
Use a NABL-accredited laboratory and keep chain-of-custody for any medicolegal sample. Reference information for occupational-health professionals — not medical advice, and not a substitute for examination by a qualified physician.
MedFactory — Occupational Health Centre software for Indian factories